| Abrasive grit | tooling | Bone and antler | Abrasion shapes and smooths hard animal materials. |
| Abrasive grit | tooling | Bone and antler | Enables Bone and antler: Abrasion shapes and smooths hard animal materials. |
| Abrasive grit | material_source | Cutting edge | Abrasives grind, smooth, and refresh edges. |
| Abrasive grit | material_source | Cutting edge | Grit helps grind and refresh simple cutting edges. |
| Abrasive grit | soft | Ochre | Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | soft | Ochre | Enables Ochre: Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | soft | Scratch hardness test | Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | soft | Scratch hardness test | Enables Scratch hardness test: Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | hard | Shell | Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | hard | Shell | Enables Shell: Abrasive grit provides a necessary starting point for this page. |
| Abrasive grit | material_source | Woodworking | Abrasives smooth tool handles, joints, and bearing surfaces. |
| Acid handling | safety | Lead-acid battery | Requires protective habits, labeling, and storage. |
| Alignment checking | test | Bicycle | Keeps wheels, frame, and steering from fighting each other. |
| Alignment checking | test | Bicycle | Single-track vehicles are intolerant of frame and wheel misalignment. |
| Alignment checking | test | Cart | Keeps wheels parallel enough to roll without dragging. |
| Alignment checking | test | Cart | Enables Cart: Keeps wheels parallel enough to roll without dragging. |
| Alignment checking | test | Chassis frame | Confirms straightness, squareness, and axle location. |
| Alignment checking | test | Chassis frame | Enables Chassis frame: Confirms straightness, squareness, and axle location. |
| Alignment checking | test | Clutch | Keeps discs, drums, or cones from grabbing unevenly. |
| Alignment checking | test | Clutch | Enables Clutch: Keeps discs, drums, or cones from grabbing unevenly. |
| Alignment checking | test | Crankshaft | Finds runout and straightness faults. |
| Alignment checking | test | Crankshaft | Enables Crankshaft: Finds runout and straightness faults. |
| Alignment checking | test | Differential gear | Controls gear mesh and bearing alignment. |
| Alignment checking | test | Differential gear | Enables Differential gear: Controls gear mesh and bearing alignment. |
| Alignment checking | test | Drive shaft | Finds runout and coupling errors. |
| Alignment checking | test | Drive shaft | Enables Drive shaft: Finds runout and coupling errors. |
| Alignment checking | test | Plain bearing | Misalignment turns a bearing into a brake. |
| Alignment checking | test | Plain bearing | Bearings fail quickly when shafts are crooked. |
| Alignment checking | test | Spoked wheel | A light wheel must be checked for wobble and roundness. |
| Alignment checking | test | Spoked wheel | Enables Spoked wheel: A light wheel must be checked for wobble and roundness. |
| Alignment checking | test | Steering gear | Confirms steering geometry and free movement. |
| Alignment checking | test | Steering gear | Enables Steering gear: Confirms steering geometry and free movement. |
| Alignment checking | test | Transmission | Keeps shafts and gears from binding. |
| Alignment checking | test | Transmission | Enables Transmission: Keeps shafts and gears from binding. |
| Animal Fat | alternative | Lubricating oil | Provides one early lubricant family. |
| Animal Fat | alternative | Lubricating oil | Enables Lubricating oil: Provides one early lubricant family. |
| Annealing | soft | Leaf spring | Supports heat-treatment practice. |
| Annealing | soft | Leaf spring | Enables Leaf spring: Supports heat-treatment practice. |
| Anvil Stone | soft | Chain | Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Chain | Enables Chain: Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Hinge | Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Hinge | Enables Hinge: Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Latch | Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Latch | Enables Latch: Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Nail | Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Nail | Enables Nail: Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Rivet | Anvil Stone provides a necessary starting point for repeatable work. |
| Anvil Stone | soft | Rivet | Enables Rivet: Anvil Stone provides a necessary starting point for repeatable work. |
| Apprenticeship | institutional | Kiln | Firing discipline and hazard control depend on trained practice. |
| Apprenticeship | institutional | Standard weights | Shared standards require trained habits and enforcement. |
| Apprenticeship | institutional | Woodworking | Repeated craft work improves when skills are taught systematically. |
| Apprenticeship | hard | Workshop organization | Apprenticeship provides a necessary starting point for this page. |
| Apprenticeship | hard | Workshop organization | Enables Workshop organization: Apprenticeship provides a necessary starting point for this page. |
| Automobile | hard | Ford Model T | Provides the general self-propelled road vehicle pattern. |
| Automobile | hard | Ford Model T | Enables Ford Model T: Provides the general self-propelled road vehicle pattern. |
| Awl | hard | Needle | Awl provides a necessary starting point for this page. |
| Awl | hard | Needle | Enables Needle: Awl provides a necessary starting point for this page. |
| Axe | hard | Adze | Axe provides a necessary starting point for this page. |
| Axe | hard | Adze | Enables Adze: Axe provides a necessary starting point for this page. |
| Band brake | safety | Automobile | Supplies controlled stopping. |
| Band brake | safety | Automobile | Enables Automobile: Supplies controlled stopping. |
| Band brake | hard | Planetary transmission | Controls gear members in early vehicle designs. |
| Band brake | hard | Planetary transmission | Enables Planetary transmission: Controls gear members in early vehicle designs. |
| Barrel | hard | Petroleum | Provides transport and storage culture. |
| Barrel | hard | Petroleum | Enables Petroleum: Provides transport and storage culture. |
| Basketry | tooling | Clay | Baskets carry clay, temper, and fired scrap. |
| Basketry | soft | Drying rack | Basketry provides a necessary starting point for this page. |
| Basketry | soft | Drying rack | Enables Drying rack: Basketry provides a necessary starting point for this page. |
| Basketry | hard | Granary | Basketry provides a necessary starting point for first trials. |
| Basketry | hard | Granary | Enables Granary: Basketry provides a necessary starting point for first trials. |
| Basketry | tooling | Paper | Baskets and screens support fiber handling and drainage. |
| Basketry | hard | Sieve | Basketry provides a necessary starting point for this page. |
| Basketry | hard | Sieve | Enables Sieve: Basketry provides a necessary starting point for this page. |
| Basketry | hard | Threshing | Basketry provides a necessary starting point for first trials. |
| Basketry | hard | Threshing | Enables Threshing: Basketry provides a necessary starting point for first trials. |
| Basketry | hard | Winnowing | Basketry provides a necessary starting point for first trials. |
| Basketry | hard | Winnowing | Enables Winnowing: Basketry provides a necessary starting point for first trials. |
| Batch labeling | test | Quality-control records | Connects parts and materials to records. |
| Batch labeling | test | Quality-control records | Enables Quality-control records: Connects parts and materials to records. |
| Battery | soft | Ignition coil | A source of electrical pulses is needed for battery ignition. |
| Bone and antler | soft | Awl | Bone and antler provides a necessary starting point for this page. |
| Bone and antler | soft | Awl | Enables Awl: Bone and antler provides a necessary starting point for this page. |
| Bone and antler | material_source | Cutting edge | Bone and antler can make scrapers, points, wedges, and handles. |
| Bone and antler | material_source | Hand drill | Bone and antler can make small bits, sockets, or bearing pieces. |
| Bone and antler | soft | Needle | Bone and antler provides a necessary starting point for this page. |
| Bone and antler | soft | Needle | Enables Needle: Bone and antler provides a necessary starting point for this page. |
| Bone and antler | soft | Scraper | Bone and antler provides a necessary starting point for this page. |
| Bone and antler | soft | Scraper | Enables Scraper: Bone and antler provides a necessary starting point for this page. |
| Camshaft | soft | Poppet valve | Provides timed opening in engines. |
| Camshaft | soft | Poppet valve | Enables Poppet valve: Provides timed opening in engines. |
| Carburetor | hard | Gasoline engine | Meters and mixes fuel with incoming air. |
| Carburetor | hard | Gasoline engine | Enables Gasoline engine: Meters and mixes fuel with incoming air. |
| Cart | hard | Automobile | Provides load paths, wheels, axles, and road-use habits. |
| Cart | hard | Automobile | Enables Automobile: Provides load paths, wheels, axles, and road-use habits. |
| Cart | soft | Bicycle | Cart work teaches wheel maintenance, load paths, and transport repair culture. |
| Ceramic insulator | material_source | Spark plug | Separates the live conductor from the shell. |
| Ceramic temper | material_source | Potter's wheel | Better clay bodies support repeatable wheel-thrown or turned forms. |
| Chalk | hard | Lime material | Chalk provides a necessary starting point for this page. |
| Chalk | hard | Lime material | Enables Lime material: Chalk provides a necessary starting point for this page. |
| Charcoal | soft | Annealing | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Annealing | Enables Annealing: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Anvil Stone | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Anvil Stone | Enables Anvil Stone: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Bellows | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Bellows | Enables Bellows: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Bloomery Furnace | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Bloomery Furnace | Enables Bloomery Furnace: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Carbon Black | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Carbon Black | Enables Carbon Black: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Casting Mold | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Casting Mold | Enables Casting Mold: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Charcoal Hearth | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Charcoal Hearth | Enables Charcoal Hearth: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Crucible | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Crucible | Enables Crucible: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Forge Hearth | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Forge Hearth | Enables Forge Hearth: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | material_source | Ink | Soot or carbon black is a practical black pigment source. |
| Charcoal | material_source | Ink | Soot and carbon black can supply black pigment. |
| Charcoal | optional | Kiln | Offers cleaner concentrated fuel for some firing work. |
| Charcoal | optional | Kiln | Charcoal can improve repeatability in some kiln and furnace work. |
| Charcoal | soft | Lost Wax Casting | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Lost Wax Casting | Enables Lost Wax Casting: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Peat | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Peat | Enables Peat: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Smoke observation | Charcoal provides a necessary starting point for this page. |
| Charcoal | soft | Smoke observation | Enables Smoke observation: Charcoal provides a necessary starting point for this page. |
| Charcoal | soft | Soot | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Soot | Enables Soot: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Tongs | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Tongs | Enables Tongs: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Tuyere | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Tuyere | Enables Tuyere: Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Wire Drawing | Charcoal provides a necessary starting point for repeatable work. |
| Charcoal | soft | Wire Drawing | Enables Wire Drawing: Charcoal provides a necessary starting point for repeatable work. |
| Chassis frame | hard | Ford Model T | Holds engine, axles, body, and passengers in alignment. |
| Chassis frame | hard | Ford Model T | Enables Ford Model T: Holds engine, axles, body, and passengers in alignment. |
| Chassis frame | soft | Leaf spring | Provides mounting points and load paths. |
| Chassis frame | soft | Leaf spring | Enables Leaf spring: Provides mounting points and load paths. |
| Chisel | hard | Mortise and tenon | Chisel provides a necessary starting point for this page. |
| Chisel | hard | Mortise and tenon | Enables Mortise and tenon: Chisel provides a necessary starting point for this page. |
| Clay | hard | Brick Clay | Clay provides a necessary starting point for first trials. |
| Clay | hard | Brick Clay | Enables Brick Clay: Clay provides a necessary starting point for first trials. |
| Clay | hard | Brickmaking | Clay provides a necessary starting point for first trials. |
| Clay | hard | Brickmaking | Enables Brickmaking: Clay provides a necessary starting point for first trials. |
| Clay | material_source | Ceramic temper | Temper is selected relative to a clay body. |
| Clay | material_source | Ceramic temper | Enables Ceramic temper: Temper is selected relative to a clay body. |
| Clay | optional | Charcoal | Clay-rich earth can help seal a mound or pit. |
| Clay | optional | Charcoal | Enables Charcoal: Clay-rich earth can help seal a mound or pit. |
| Clay | hard | Clay Slip | Clay provides a necessary starting point for first trials. |
| Clay | hard | Clay Slip | Enables Clay Slip: Clay provides a necessary starting point for first trials. |
| Clay | hard | Clay tablet records | Clay provides a necessary starting point for this page. |
| Clay | hard | Clay tablet records | Enables Clay tablet records: Clay provides a necessary starting point for this page. |
| Clay | hard | Fired Brick | Clay provides a necessary starting point for first trials. |
| Clay | hard | Fired Brick | Enables Fired Brick: Clay provides a necessary starting point for first trials. |
| Clay | material_source | Grog | Grog comes from fired clay or ceramic waste. |
| Clay | material_source | Grog | Enables Grog: Grog comes from fired clay or ceramic waste. |
| Clay | hard | Hurdle | Clay provides a necessary starting point for first trials. |
| Clay | hard | Hurdle | Enables Hurdle: Clay provides a necessary starting point for first trials. |
| Clay | material_source | Kiln firing test | Clay samples are the tested material. |
| Clay | material_source | Kiln firing test | Enables Kiln firing test: Clay samples are the tested material. |
| Clay | material_source | Kiln | Supplies lining, sealing, bricks, shelves, and test pieces. |
| Clay | material_source | Kiln | Clay forms refractory walls, shelves, sealants, and test pieces. |
| Clay | hard | Loom weights | Clay provides a necessary starting point for this page. |
| Clay | hard | Loom weights | Enables Loom weights: Clay provides a necessary starting point for this page. |
| Clay | hard | Mortar | Clay provides a necessary starting point for first trials. |
| Clay | hard | Mortar | Enables Mortar: Clay provides a necessary starting point for first trials. |
| Clay | hard | Plaster | Clay provides a necessary starting point for first trials. |
| Clay | hard | Plaster | Enables Plaster: Clay provides a necessary starting point for first trials. |
| Clay | hard | Plastering | Clay provides a necessary starting point for first trials. |
| Clay | hard | Plastering | Enables Plastering: Clay provides a necessary starting point for first trials. |
| Clay | material_source | Potter's wheel | Supplies the plastic material being shaped. |
| Clay | material_source | Potter's wheel | Enables Potter's wheel: Supplies the plastic material being shaped. |
| Clay | hard | Roof Tile | Clay provides a necessary starting point for first trials. |
| Clay | hard | Roof Tile | Enables Roof Tile: Clay provides a necessary starting point for first trials. |
| Clay | hard | Shrinkage test | Clay provides a necessary starting point for this page. |
| Clay | hard | Shrinkage test | Enables Shrinkage test: Clay provides a necessary starting point for this page. |
| Clay | hard | Storage jar | Clay provides a necessary starting point for this page. |
| Clay | hard | Storage jar | Enables Storage jar: Clay provides a necessary starting point for this page. |
| Clay | hard | Thatching | Clay provides a necessary starting point for first trials. |
| Clay | hard | Thatching | Enables Thatching: Clay provides a necessary starting point for first trials. |
| Clay | hard | Tile Making | Clay provides a necessary starting point for first trials. |
| Clay | hard | Tile Making | Enables Tile Making: Clay provides a necessary starting point for first trials. |
| Clay | hard | Wattle and Daub | Clay provides a necessary starting point for first trials. |
| Clay | hard | Wattle and Daub | Enables Wattle and Daub: Clay provides a necessary starting point for first trials. |
| Clay | optional | Writing | Clay tablets are an early record medium where paper is absent. |
| Clutch | hard | Transmission | Lets power be engaged and disengaged. |
| Clutch | hard | Transmission | Enables Transmission: Lets power be engaged and disengaged. |
| Container sealing | hard | Lead-acid battery | Prevents leaks and contamination. |
| Copper wire | material_source | Ignition coil | Windings require insulated conductive wire. |
| Cordage fiber | material_source | Basketry | Basketry needs flexible fibers, splints, stems, or roots. |
| Cordage fiber | material_source | Basketry | Basketry can use long fibers, splints, and flexible stems. |
| Cordage fiber | knowledge | Flax fiber | General fiber recognition and testing come before specializing in flax. |
| Cordage fiber | knowledge | Flax fiber | Enables Flax fiber: General fiber recognition and testing come before specializing in flax. |
| Cordage fiber | soft | Heddle | Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | soft | Heddle | Enables Heddle: Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | hard | Hemp Fiber | Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Hemp Fiber | Enables Hemp Fiber: Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Linen Thread | Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Linen Thread | Enables Linen Thread: Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | soft | Net making | Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | soft | Net making | Enables Net making: Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | hard | Nettle Fiber | Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Nettle Fiber | Enables Nettle Fiber: Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | material_source | Rope making | Rope making begins with sorted fiber. |
| Cordage fiber | material_source | Rope | Rope requires twistable fibers. |
| Cordage fiber | soft | Sieve | Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | soft | Sieve | Enables Sieve: Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | material_source | Spindle | Spindles need prepared fiber to be useful. |
| Cordage fiber | material_source | Spindle | Enables Spindle: Spindles need prepared fiber to be useful. |
| Cordage fiber | soft | Spinning | Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | soft | Spinning | Enables Spinning: Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | hard | Wool Yarn | Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Wool Yarn | Enables Wool Yarn: Cordage fiber provides a necessary starting point for first trials. |
| Cordage fiber | hard | Wool | Cordage fiber provides a necessary starting point for this page. |
| Cordage fiber | hard | Wool | Enables Wool: Cordage fiber provides a necessary starting point for this page. |
| Counting | hard | Abacus | Counting provides a necessary starting point for first trials. |
| Counting | hard | Abacus | Enables Abacus: Counting provides a necessary starting point for first trials. |
| Counting | knowledge | Alignment checking | Repeated marks, comparisons, and records benefit from number. |
| Counting | knowledge | Alignment checking | Enables Alignment checking: Repeated marks, comparisons, and records benefit from number. |
| Counting | hard | Angle Gauge | Counting provides a necessary starting point for first trials. |
| Counting | hard | Angle Gauge | Enables Angle Gauge: Counting provides a necessary starting point for first trials. |
| Counting | hard | Balance Scale | Counting provides a necessary starting point for first trials. |
| Counting | hard | Balance Scale | Enables Balance Scale: Counting provides a necessary starting point for first trials. |
| Counting | hard | Field Survey | Counting provides a necessary starting point for first trials. |
| Counting | hard | Field Survey | Enables Field Survey: Counting provides a necessary starting point for first trials. |
| Counting | hard | Land Boundary Marker | Counting provides a necessary starting point for first trials. |
| Counting | hard | Land Boundary Marker | Enables Land Boundary Marker: Counting provides a necessary starting point for first trials. |
| Counting | knowledge | Measuring rod | Marks become more useful when counts and named divisions are shared. |
| Counting | knowledge | Measuring rod | Enables Measuring rod: Marks become more useful when counts and named divisions are shared. |
| Counting | knowledge | Rope making | Strand count, sample labels, and batch comparisons need number. |
| Counting | knowledge | Rope making | Enables Rope making: Strand count, sample labels, and batch comparisons need number. |
| Counting | optional | Sanitation norms | Counting illness events and inspections helps identify patterns. |
| Counting | optional | Sanitation norms | Enables Sanitation norms: Counting illness events and inspections helps identify patterns. |
| Counting | hard | Seasonal Calendar | Counting provides a necessary starting point for first trials. |
| Counting | hard | Seasonal Calendar | Enables Seasonal Calendar: Counting provides a necessary starting point for first trials. |
| Counting | hard | Sighting Frame | Counting provides a necessary starting point for first trials. |
| Counting | hard | Sighting Frame | Enables Sighting Frame: Counting provides a necessary starting point for first trials. |
| Counting | knowledge | Standard weights | Weight sets need repeated units and multiples. |
| Counting | measurement | Standard weights | Repeated units and comparisons require stable counting. |
| Counting | hard | Tally Stick | Counting provides a necessary starting point for first trials. |
| Counting | hard | Tally Stick | Enables Tally Stick: Counting provides a necessary starting point for first trials. |
| Counting | knowledge | Technical drawing | Parts lists and dimensions require number. |
| Counting | knowledge | Technical drawing | Dimensions, repetitions, and parts lists need number. |
| Counting | knowledge | Timber seasoning | Batches and waiting periods must be tracked. |
| Counting | knowledge | Timber seasoning | Enables Timber seasoning: Batches and waiting periods must be tracked. |
| Counting | hard | Volume Measure | Counting provides a necessary starting point for first trials. |
| Counting | hard | Volume Measure | Enables Volume Measure: Counting provides a necessary starting point for first trials. |
| Counting | knowledge | Workshop records | Batches, measures, and comparisons need counting. |
| Counting | knowledge | Workshop records | Enables Workshop records: Batches, measures, and comparisons need counting. |
| Counting | knowledge | Writing | Numbers and tallies are the easiest bridge into records. |
| Counting | knowledge | Writing | Tallies and numerals bridge spoken counting to records. |
| Crankshaft | hard | Internal combustion engine | Turns reciprocating motion into rotary output. |
| Crankshaft | hard | Internal combustion engine | Enables Internal combustion engine: Turns reciprocating motion into rotary output. |
| Cutting edge | soft | Animal Fat | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Animal Fat | Enables Animal Fat: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | hard | Awl | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Awl | Enables Awl: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Axe | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Axe | Enables Axe: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Bark Fiber | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Bark Fiber | Enables Bark Fiber: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Bark | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Bark | Enables Bark: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Birch Bark | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Birch Bark | Enables Birch Bark: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | hard | Chisel | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Chisel | Enables Chisel: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | tooling | Cordage fiber | Cutting tools help harvest and clean fibrous plants or hides. |
| Cutting edge | tooling | Cordage fiber | Enables Cordage fiber: Cutting tools help harvest and clean fibrous plants or hides. |
| Cutting edge | tooling | Hand drill | Drill points and scrapers require controlled edges. |
| Cutting edge | tooling | Hand drill | Enables Hand drill: Drill points and scrapers require controlled edges. |
| Cutting edge | soft | Hardwood | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Hardwood | Enables Hardwood: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Hoof | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Hoof | Enables Hoof: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Horn Glue | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Horn Glue | Enables Horn Glue: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Horn | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Horn | Enables Horn: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | hard | Lathe | Sharp tools are required. |
| Cutting edge | hard | Lathe | Enables Lathe: Sharp tools are required. |
| Cutting edge | tooling | Leather | Scraping and trimming hides require effective edges. |
| Cutting edge | tooling | Leather | Hide work needs scraping, trimming, and piercing. |
| Cutting edge | hard | Machining | Tools need sharpened edges. |
| Cutting edge | hard | Machining | Enables Machining: Tools need sharpened edges. |
| Cutting edge | soft | Rawhide | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Rawhide | Enables Rawhide: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Reed | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Reed | Enables Reed: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Resin | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Resin | Enables Resin: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | tooling | Rope making | Fiber harvest and preparation often require cutting and scraping. |
| Cutting edge | soft | Rush | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Rush | Enables Rush: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Saw | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Saw | Enables Saw: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Scraper | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Scraper | Enables Scraper: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Shell | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Shell | Enables Shell: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Sinew | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | hard | Sinew | Enables Sinew: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Softwood | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Softwood | Enables Softwood: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Tallow | Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | soft | Tallow | Enables Tallow: Cutting edge provides a necessary starting point for repeatable work. |
| Cutting edge | tooling | Timber | Edged tools make timber conversion faster, cleaner, and safer. |
| Cutting edge | tooling | Timber | Enables Timber: Edged tools make timber conversion faster, cleaner, and safer. |
| Cutting edge | tooling | Try-square | Cutting and scraping tools shape the reference arms. |
| Cutting edge | tooling | Try-square | Enables Try-square: Cutting and scraping tools shape the reference arms. |
| Cutting edge | soft | Willow | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Willow | Enables Willow: Cutting edge provides a necessary starting point for this page. |
| Cutting edge | tooling | Woodworking | Woodworking requires cutting, scraping, boring, or marking edges. |
| Cutting edge | soft | Wool | Cutting edge provides a necessary starting point for this page. |
| Cutting edge | soft | Wool | Enables Wool: Cutting edge provides a necessary starting point for this page. |
| Cylinder boring | hard | Piston and cylinder | Creates round, smooth bores. |
| Cylinder boring | hard | Piston and cylinder | Enables Piston and cylinder: Creates round, smooth bores. |
| Die making | tooling | Stamping press | Creates shaped tools for repeated parts. |
| Differential gear | hard | Ford Model T | Lets driven wheels turn at different speeds through corners. |
| Differential gear | hard | Ford Model T | Enables Ford Model T: Lets driven wheels turn at different speeds through corners. |
| Distillation | refining | Oil refining | Provides the general separation principle. |
| Drill press | tooling | Machining | Makes repeatable holes. |
| Drill press | tooling | Machining | Enables Machining: Makes repeatable holes. |
| Drive shaft | soft | Differential gear | Feeds power into the axle assembly. |
| Drive shaft | soft | Differential gear | Enables Differential gear: Feeds power into the axle assembly. |
| Factory assembly line | institutional | Ford Model T | Turns the design into repeatable, low-cost production. |
| Factory assembly line | institutional | Ford Model T | Enables Ford Model T: Turns the design into repeatable, low-cost production. |
| Factory assembly line | soft | Stamping press | Creates demand for repeated stamped parts. |
| Factory assembly line | soft | Stamping press | Enables Stamping press: Creates demand for repeated stamped parts. |
| Firekeeping | hard | Annealing | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Annealing | Enables Annealing: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Anvil Stone | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Anvil Stone | Enables Anvil Stone: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Beeswax | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Beeswax | Enables Beeswax: Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Bellows | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Bellows | Enables Bellows: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Bloomery Furnace | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Bloomery Furnace | Enables Bloomery Furnace: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Carbon Black | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Carbon Black | Enables Carbon Black: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Casting Mold | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Casting Mold | Enables Casting Mold: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Charcoal Hearth | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Charcoal Hearth | Enables Charcoal Hearth: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Charcoal | Maintaining and observing controlled fires is required. |
| Firekeeping | hard | Charcoal | Charcoal production requires watched, controlled fire. |
| Firekeeping | hard | Crucible | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Crucible | Enables Crucible: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Forge Hearth | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Forge Hearth | Enables Forge Hearth: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Hide glue | Gentle controlled heat is needed without burning the batch. |
| Firekeeping | tooling | Hide glue | Glue extraction and use need gentle heat control. |
| Firekeeping | hard | Kiln | Kilns depend on fire tending and hazard control. |
| Firekeeping | soft | Lime material | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | soft | Lime material | Enables Lime material: Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Lost Wax Casting | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Lost Wax Casting | Enables Lost Wax Casting: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Peat | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Peat | Enables Peat: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | soft | Pitch | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | soft | Pitch | Enables Pitch: Firekeeping provides a necessary starting point for this page. |
| Firekeeping | soft | Resin | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | soft | Resin | Enables Resin: Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Smoke observation | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Smoke observation | Enables Smoke observation: Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Soot | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Soot | Enables Soot: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Tongs | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Tongs | Enables Tongs: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Tuyere | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Tuyere | Enables Tuyere: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Wire Drawing | Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Wire Drawing | Enables Wire Drawing: Firekeeping provides a necessary starting point for first trials. |
| Firekeeping | hard | Wood ash | Firekeeping provides a necessary starting point for this page. |
| Firekeeping | hard | Wood ash | Enables Wood ash: Firekeeping provides a necessary starting point for this page. |
| Flax fiber | material_source | Spindle | Flax can be spun into finer continuous thread. |
| Flax fiber | material_source | Weaving | Prepared fiber can be spun or twisted into weaveable thread. |
| Flax fiber | material_source | Weaving | Prepared flax supports linen thread and woven cloth. |
| Flaxseed Oil | alternative | Lubricating oil | Provides a plant oil path for light uses. |
| Flaxseed Oil | alternative | Lubricating oil | Enables Lubricating oil: Provides a plant oil path for light uses. |
| Fluid metering | hard | Carburetor | Controls small flows repeatably. |
| Friction material | material_source | Band brake | Provides controlled drag and wear. |
| Friction material | material_source | Clutch | Provides controlled grip and wear. |
| Fuel storage | safety | Fuel tank | Defines cautious handling and labeling. |
| Fuel storage | safety | Gasoline | Requires labeled, ventilated, fire-aware handling. |
| Gasoline engine | hard | Ford Model T | Supplies compact mobile power. |
| Gasoline engine | hard | Ford Model T | Enables Ford Model T: Supplies compact mobile power. |
| Gasoline | hard | Carburetor | Defines the fuel behavior being handled. |
| Gasoline | hard | Carburetor | Enables Carburetor: Defines the fuel behavior being handled. |
| Gasoline | hard | Gasoline engine | Supplies the fuel family. |
| Gasoline | hard | Gasoline engine | Enables Gasoline engine: Supplies the fuel family. |
| Gear cutting | soft | Camshaft | Synchronizes cam timing with a crankshaft. |
| Gear cutting | soft | Camshaft | Enables Camshaft: Synchronizes cam timing with a crankshaft. |
| Gear cutting | hard | Differential gear | Creates matched bevel or spur gears. |
| Gear cutting | hard | Differential gear | Enables Differential gear: Creates matched bevel or spur gears. |
| Gear cutting | hard | Planetary transmission | Planetary gears demand repeatable tooth geometry. |
| Gear cutting | hard | Planetary transmission | Enables Planetary transmission: Planetary gears demand repeatable tooth geometry. |
| Gear cutting | soft | Steering gear | Supports worm, sector, or reduction gears. |
| Gear cutting | soft | Steering gear | Enables Steering gear: Supports worm, sector, or reduction gears. |
| Gear cutting | hard | Transmission | Creates repeatable gear teeth. |
| Gear cutting | hard | Transmission | Enables Transmission: Creates repeatable gear teeth. |
| Geological survey | knowledge | Petroleum | Finds seep and well prospects. |
| Go/no-go gauge | test | Ball bearing | Sorts balls and races by fit. |
| Go/no-go gauge | test | Ball bearing | Enables Ball bearing: Sorts balls and races by fit. |
| Go/no-go gauge | test | Camshaft | Checks journals and follower fits. |
| Go/no-go gauge | test | Camshaft | Enables Camshaft: Checks journals and follower fits. |
| Go/no-go gauge | test | Carburetor | Checks fittings and orifices within accepted limits. |
| Go/no-go gauge | test | Carburetor | Enables Carburetor: Checks fittings and orifices within accepted limits. |
| Go/no-go gauge | test | Cylinder boring | Checks whether a bore falls inside accepted limits. |
| Go/no-go gauge | test | Cylinder boring | Enables Cylinder boring: Checks whether a bore falls inside accepted limits. |
| Go/no-go gauge | test | Gear cutting | Checks tooth form and fit against a mate. |
| Go/no-go gauge | test | Gear cutting | Enables Gear cutting: Checks tooth form and fit against a mate. |
| Go/no-go gauge | test | Interchangeable parts | Enforces accepted fit limits. |
| Go/no-go gauge | test | Interchangeable parts | Enables Interchangeable parts: Enforces accepted fit limits. |
| Go/no-go gauge | test | Machining | Separates acceptable from unacceptable fits. |
| Go/no-go gauge | test | Machining | Enables Machining: Separates acceptable from unacceptable fits. |
| Go/no-go gauge | test | Magneto | Checks shaft, bearing, and contact fits. |
| Go/no-go gauge | test | Magneto | Enables Magneto: Checks shaft, bearing, and contact fits. |
| Go/no-go gauge | test | Planetary transmission | Checks gear and shaft fits. |
| Go/no-go gauge | test | Planetary transmission | Enables Planetary transmission: Checks gear and shaft fits. |
| Go/no-go gauge | test | Rolling mill | Checks output thickness and section. |
| Go/no-go gauge | test | Rolling mill | Enables Rolling mill: Checks output thickness and section. |
| Go/no-go gauge | test | Sheet steel | Checks thickness and fit. |
| Go/no-go gauge | test | Sheet steel | Enables Sheet steel: Checks thickness and fit. |
| Go/no-go gauge | test | Spark plug | Checks thread and gap acceptability. |
| Go/no-go gauge | test | Spark plug | Enables Spark plug: Checks thread and gap acceptability. |
| Go/no-go gauge | test | Threaded fastener | Checks whether threads fit accepted limits. |
| Go/no-go gauge | test | Threaded fastener | Enables Threaded fastener: Checks whether threads fit accepted limits. |
| Grog | material_source | Ceramic temper | Grog is a common temper candidate. |
| Hand drill | hard | Drill press | Provides basic rotary drilling practice. |
| Hand drill | hard | Drill press | Enables Drill press: Provides basic rotary drilling practice. |
| Hand drill | hard | Peg joint | Hand drill provides a necessary starting point for this page. |
| Hand drill | hard | Peg joint | Enables Peg joint: Hand drill provides a necessary starting point for this page. |
| Hand drill | tooling | Plain bearing | Bearing housings and pins need controllable holes. |
| Hand drill | tooling | Spindle | Drilling helps make balanced whorls and sockets. |
| Hand drill | tooling | Spindle | Spindle whorls, sockets, and shafts benefit from bored holes. |
| Hand drill | tooling | Woodworking | Holes improve pegs, lashings, axles, fixtures, and joinery. |
| Hide glue | material_source | Paper | Glue can size sheets or support bindings where appropriate. |
| Hide glue | material_source | Woodworking | Glue expands joinery, veneer, repair, and jig options. |
| Ignition coil | hard | Magneto | Provides winding and insulation practice. |
| Ignition coil | hard | Magneto | Enables Magneto: Provides winding and insulation practice. |
| Ignition coil | hard | Spark ignition | Raises voltage for spark production. |
| Ignition coil | hard | Spark ignition | Enables Spark ignition: Raises voltage for spark production. |
| Indexing | measurement | Gear cutting | Divides a circle into repeatable tooth positions. |
| Ink | optional | Paper | Ink and paper need compatibility tests. |
| Ink | material_source | Technical drawing | Stable marks make reusable drawings and labels. |
| Insulating varnish | material_source | Ignition coil | Coils require insulation between turns. |
| Interchangeable parts | hard | Factory assembly line | Allows parts to move between stations without custom fitting. |
| Interchangeable parts | hard | Factory assembly line | Enables Factory assembly line: Allows parts to move between stations without custom fitting. |
| Interchangeable parts | test | Ford Model T | Makes service and mass production practical. |
| Interchangeable parts | test | Ford Model T | Enables Ford Model T: Makes service and mass production practical. |
| Interchangeable parts | hard | Service manual | Makes replacement instructions meaningful. |
| Interchangeable parts | hard | Service manual | Enables Service manual: Makes replacement instructions meaningful. |
| Interchangeable parts | test | Threaded fastener | Requires standard thread forms and tolerances. |
| Interchangeable parts | test | Threaded fastener | Enables Threaded fastener: Requires standard thread forms and tolerances. |
| Internal combustion engine | hard | Automobile | Provides compact motive power. |
| Internal combustion engine | hard | Automobile | Enables Automobile: Provides compact motive power. |
| Internal combustion engine | hard | Gasoline engine | Provides the engine architecture. |
| Internal combustion engine | hard | Gasoline engine | Enables Gasoline engine: Provides the engine architecture. |
| Iron core | material_source | Ignition coil | Magnetic cores improve coil action. |
| Iron Ore | material_source | Mild steel | Provides iron feedstock. |
| Iron Ore | material_source | Mild steel | Enables Mild steel: Provides iron feedstock. |
| Kiln firing test | soft | Brick Clay | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Brick Clay | Enables Brick Clay: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | test | Ceramic temper | Temper choices need firing comparison. |
| Kiln firing test | soft | Clay Slip | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Clay Slip | Enables Clay Slip: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Fired Brick | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Fired Brick | Enables Fired Brick: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | test | Grog | Fired samples reveal whether crushed material behaves well in a new body. |
| Kiln firing test | test | Grog | Crushed fired clay is judged by how it behaves in new clay. |
| Kiln firing test | soft | Loom weights | Kiln firing test provides a necessary starting point for this page. |
| Kiln firing test | soft | Loom weights | Enables Loom weights: Kiln firing test provides a necessary starting point for this page. |
| Kiln firing test | soft | Mortar | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Mortar | Enables Mortar: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Plaster | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Plaster | Enables Plaster: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Roof Tile | Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Roof Tile | Enables Roof Tile: Kiln firing test provides a necessary starting point for repeatable work. |
| Kiln firing test | soft | Storage jar | Kiln firing test provides a necessary starting point for this page. |
| Kiln firing test | soft | Storage jar | Enables Storage jar: Kiln firing test provides a necessary starting point for this page. |
| Kiln | optional | Ink | Controlled soot collection can feed some black pigment supply chains. |
| Kiln | tooling | Kiln firing test | A kiln or controlled firing structure is the test environment. |
| Kiln | tooling | Kiln firing test | Enables Kiln firing test: A kiln or controlled firing structure is the test environment. |
| Kiln | optional | Paper | Kiln-dried ash or lime processing may support later workshop chemistry, though paper does not require a kiln. |
| Knot tying | soft | Lashing | Knot tying provides a necessary starting point for this page. |
| Knot tying | soft | Lashing | Enables Lashing: Knot tying provides a necessary starting point for this page. |
| Knot tying | hard | Net making | Knot tying provides a necessary starting point for this page. |
| Knot tying | hard | Net making | Enables Net making: Knot tying provides a necessary starting point for this page. |
| Lashing | soft | Animal Harness | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Animal Harness | Enables Animal Harness: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Hoe | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Hoe | Enables Hoe: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Plow | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Plow | Enables Plow: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Shovel | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Shovel | Enables Shovel: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Sickle | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Sickle | Enables Sickle: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Sled | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Sled | Enables Sled: Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Yoke | Lashing provides a necessary starting point for repeatable work. |
| Lashing | soft | Yoke | Enables Yoke: Lashing provides a necessary starting point for repeatable work. |
| Lathe | tooling | Crankshaft | Keeps journals concentric. |
| Lathe | tooling | Crankshaft | Enables Crankshaft: Keeps journals concentric. |
| Lathe | tooling | Cylinder boring | Provides rotary alignment and cutting feed. |
| Lathe | tooling | Cylinder boring | Enables Cylinder boring: Provides rotary alignment and cutting feed. |
| Lathe | tooling | Drive shaft | Turns and trues shaft journals. |
| Lathe | tooling | Drive shaft | Enables Drive shaft: Turns and trues shaft journals. |
| Lathe | tooling | Machining | Provides one foundational machine-tool operation. |
| Lathe | tooling | Machining | Enables Machining: Provides one foundational machine-tool operation. |
| Lathe | tooling | Threaded fastener | Cuts accurate threads in early versions. |
| Lathe | tooling | Threaded fastener | Enables Threaded fastener: Cuts accurate threads in early versions. |
| Lead Ore | material_source | Lead-acid battery | Provides the lead supply chain. |
| Lead Ore | material_source | Lead-acid battery | Enables Lead-acid battery: Provides the lead supply chain. |
| Leak test | test | Fuel tank | Finds unsafe seams and fittings. |
| Leak test | test | Pneumatic tire | Finds punctures and bad seams. |
| Leak test | test | Poppet valve | Checks whether the valve seals. |
| Leak test | test | Radiator | Finds coolant leaks before use. |
| Leak test | test | Water-jacket cooling | Checks jackets, hoses, and fittings. |
| Leak test | test | Water pump | Confirms seals and joints. |
| Leather | hard | Animal Fat | Leather provides a necessary starting point for first trials. |
| Leather | hard | Animal Fat | Enables Animal Fat: Leather provides a necessary starting point for first trials. |
| Leather | material_source | Bicycle | Leather can supply seats, straps, pads, and flexible joints in early builds. |
| Leather | hard | Hoof | Leather provides a necessary starting point for first trials. |
| Leather | hard | Hoof | Enables Hoof: Leather provides a necessary starting point for first trials. |
| Leather | hard | Horn Glue | Leather provides a necessary starting point for first trials. |
| Leather | hard | Horn Glue | Enables Horn Glue: Leather provides a necessary starting point for first trials. |
| Leather | hard | Horn | Leather provides a necessary starting point for first trials. |
| Leather | hard | Horn | Enables Horn: Leather provides a necessary starting point for first trials. |
| Leather | material_source | Plain bearing | Leather can serve as a liner, seal, washer, or low-speed bearing surface. |
| Leather | material_source | Pulley | Leather straps and pads help with belts, slings, and wear surfaces. |
| Leather | hard | Rawhide | Leather provides a necessary starting point for first trials. |
| Leather | hard | Rawhide | Enables Rawhide: Leather provides a necessary starting point for first trials. |
| Leather | hard | Tallow | Leather provides a necessary starting point for first trials. |
| Leather | hard | Tallow | Enables Tallow: Leather provides a necessary starting point for first trials. |
| Lever | hard | Band brake | Lets a person apply force. |
| Lever | hard | Band brake | Enables Band brake: Lets a person apply force. |
| Lever | hard | Clutch | Provides controllable human actuation. |
| Lever | hard | Clutch | Enables Clutch: Provides controllable human actuation. |
| Lever | knowledge | Pulley | Helps reason about load and support forces. |
| Lever | knowledge | Pulley | Lever reasoning helps explain torque, load, and support forces. |
| Lever | enables | Standard weights | A balance beam uses lever arms to compare masses. |
| Lever | tooling | Standard weights | A balance beam is a lever used for comparison. |
| Lever | optional | Tensile test | Levers can apply or multiply test force. |
| Lever | optional | Tensile test | Enables Tensile test: Levers can apply or multiply test force. |
| Lever | knowledge | Wheel and axle | Understand how a longer radius trades force for distance. |
| Lever | knowledge | Wheel and axle | The radius of a wheel acts like a continuous lever around an axle. |
| Loom | hard | Heddle | Loom provides a necessary starting point for this page. |
| Loom | hard | Heddle | Enables Heddle: Loom provides a necessary starting point for this page. |
| Lubricating oil | hard | Ball bearing | Protects rolling contact surfaces. |
| Lubricating oil | hard | Ball bearing | Enables Ball bearing: Protects rolling contact surfaces. |
| Lubricating oil | hard | Crankshaft | Protects loaded journals in use. |
| Lubricating oil | hard | Crankshaft | Enables Crankshaft: Protects loaded journals in use. |
| Lubricating oil | soft | Cylinder boring | Helps cutting and inspection by controlling heat and friction. |
| Lubricating oil | soft | Cylinder boring | Enables Cylinder boring: Helps cutting and inspection by controlling heat and friction. |
| Lubricating oil | hard | Differential gear | Protects loaded gear teeth and bearings. |
| Lubricating oil | hard | Differential gear | Enables Differential gear: Protects loaded gear teeth and bearings. |
| Lubricating oil | hard | Internal combustion engine | Reduces destructive friction and wear. |
| Lubricating oil | hard | Internal combustion engine | Enables Internal combustion engine: Reduces destructive friction and wear. |
| Lubricating oil | hard | Piston and cylinder | Prevents immediate scoring and seizure. |
| Lubricating oil | hard | Piston and cylinder | Enables Piston and cylinder: Prevents immediate scoring and seizure. |
| Lubricating oil | hard | Transmission | Prevents rapid gear and bearing failure. |
| Lubricating oil | hard | Transmission | Enables Transmission: Prevents rapid gear and bearing failure. |
| Machining | hard | Ball bearing | Creates races and retainers. |
| Machining | hard | Ball bearing | Enables Ball bearing: Creates races and retainers. |
| Machining | hard | Camshaft | Shapes lobes and journals. |
| Machining | hard | Camshaft | Enables Camshaft: Shapes lobes and journals. |
| Machining | tooling | Carburetor | Makes small passages, needles, and seats. |
| Machining | tooling | Carburetor | Enables Carburetor: Makes small passages, needles, and seats. |
| Machining | hard | Crankshaft | Forms journals, throws, and shoulders. |
| Machining | hard | Crankshaft | Enables Crankshaft: Forms journals, throws, and shoulders. |
| Machining | hard | Cylinder boring | Supplies tool grinding, feeds, and workholding practice. |
| Machining | hard | Cylinder boring | Enables Cylinder boring: Supplies tool grinding, feeds, and workholding practice. |
| Machining | hard | Gear cutting | Provides cutting, feeds, and fixture practice. |
| Machining | hard | Gear cutting | Enables Gear cutting: Provides cutting, feeds, and fixture practice. |
| Machining | tooling | Interchangeable parts | Makes controlled surfaces and holes. |
| Machining | tooling | Interchangeable parts | Enables Interchangeable parts: Makes controlled surfaces and holes. |
| Machining | tooling | Magneto | Keeps rotating parts aligned. |
| Machining | tooling | Magneto | Enables Magneto: Keeps rotating parts aligned. |
| Machining | tooling | Piston and cylinder | Shapes piston, rings, and bearing surfaces. |
| Machining | tooling | Piston and cylinder | Enables Piston and cylinder: Shapes piston, rings, and bearing surfaces. |
| Machining | hard | Poppet valve | Makes stems, heads, and seats fit. |
| Machining | hard | Poppet valve | Enables Poppet valve: Makes stems, heads, and seats fit. |
| Machining | soft | Water pump | Improves impellers, shafts, and housings. |
| Machining | soft | Water pump | Enables Water pump: Improves impellers, shafts, and housings. |
| Magneto | soft | Gasoline engine | Can produce ignition current without a large battery. |
| Magneto | soft | Gasoline engine | Enables Gasoline engine: Can produce ignition current without a large battery. |
| Measuring rod | soft | Abacus | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Abacus | Enables Abacus: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Angle Gauge | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Angle Gauge | Enables Angle Gauge: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Balance Scale | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Balance Scale | Enables Balance Scale: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | hard | Bridge Trestle | Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Bridge Trestle | Enables Bridge Trestle: Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Drainage Ditch | Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Drainage Ditch | Enables Drainage Ditch: Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | soft | Field Survey | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Field Survey | Enables Field Survey: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | measurement | Go/no-go gauge | Provides length comparison practice. |
| Measuring rod | measurement | Go/no-go gauge | Enables Go/no-go gauge: Provides length comparison practice. |
| Measuring rod | soft | Land Boundary Marker | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Land Boundary Marker | Enables Land Boundary Marker: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Loom | Measuring rod provides a necessary starting point for this page. |
| Measuring rod | soft | Loom | Enables Loom: Measuring rod provides a necessary starting point for this page. |
| Measuring rod | hard | Moisture Test | Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Moisture Test | Enables Moisture Test: Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Proof Load Test | Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Proof Load Test | Enables Proof Load Test: Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Road Building | Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | hard | Road Building | Enables Road Building: Measuring rod provides a necessary starting point for first trials. |
| Measuring rod | soft | Seasonal Calendar | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Seasonal Calendar | Enables Seasonal Calendar: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Shrinkage test | Measuring rod provides a necessary starting point for this page. |
| Measuring rod | soft | Shrinkage test | Enables Shrinkage test: Measuring rod provides a necessary starting point for this page. |
| Measuring rod | soft | Sighting Frame | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Sighting Frame | Enables Sighting Frame: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | measurement | Standard weights | Shared measures support wider standardization habits. |
| Measuring rod | hard | Straightedge | Measuring rod provides a necessary starting point for this page. |
| Measuring rod | hard | Straightedge | Enables Straightedge: Measuring rod provides a necessary starting point for this page. |
| Measuring rod | soft | Tally Stick | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Tally Stick | Enables Tally Stick: Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | measurement | Technical drawing | Drawings need transferred dimensions. |
| Measuring rod | measurement | Try-square | Reliable lengths and marks support square layout. |
| Measuring rod | measurement | Try-square | A square needs stable reference lengths and layout marks. |
| Measuring rod | soft | Volume Measure | Measuring rod provides a necessary starting point for repeatable work. |
| Measuring rod | soft | Volume Measure | Enables Volume Measure: Measuring rod provides a necessary starting point for repeatable work. |
| Mild steel | hard | Chassis frame | Provides a tough frame material. |
| Mild steel | hard | Chassis frame | Enables Chassis frame: Provides a tough frame material. |
| Mild steel | hard | Rolling mill | Provides roll and frame material. |
| Mild steel | hard | Rolling mill | Enables Rolling mill: Provides roll and frame material. |
| Mild steel | hard | Sheet steel | Provides workable steel stock. |
| Mild steel | hard | Sheet steel | Enables Sheet steel: Provides workable steel stock. |
| Mortar and pestle | soft | Quern | Mortar and pestle provides a necessary starting point for this page. |
| Mortar and pestle | soft | Quern | Enables Quern: Mortar and pestle provides a necessary starting point for this page. |
| Natural rubber | material_source | Vulcanized rubber | Provides latex or raw rubber feedstock. |
| Oil refining | refining | Gasoline | Separates useful petroleum fractions. |
| Oil refining | refining | Gasoline | Enables Gasoline: Separates useful petroleum fractions. |
| Paper | optional | Ink | Ink and paper co-evolve as record media. |
| Paper | material_source | Technical drawing | Paper gives a portable drawing and template surface. |
| Permanent magnet | hard | Magneto | Supplies the magnetic field. |
| Petroleum | material_source | Gasoline | Provides the crude source. |
| Petroleum | material_source | Gasoline | Enables Gasoline: Provides the crude source. |
| Petroleum | soft | Lubricating oil | Provides mineral oil feedstock for industrial lubrication. |
| Petroleum | soft | Lubricating oil | Enables Lubricating oil: Provides mineral oil feedstock for industrial lubrication. |
| Petroleum | material_source | Oil refining | Supplies crude feedstock. |
| Petroleum | material_source | Oil refining | Enables Oil refining: Supplies crude feedstock. |
| Piston and cylinder | hard | Internal combustion engine | Converts pressure pulses into reciprocating motion. |
| Piston and cylinder | hard | Internal combustion engine | Enables Internal combustion engine: Converts pressure pulses into reciprocating motion. |
| Plain bearing | enables | Bicycle | Hubs, steering pivots, and early cranks need controlled friction. |
| Plain bearing | hard | Bicycle | Reduces hub and steering friction enough for repeatable riding. |
| Plain bearing | soft | Cart | Reduces axle wear for repeated use. |
| Plain bearing | soft | Cart | Enables Cart: Reduces axle wear for repeated use. |
| Plain bearing | soft | Clutch | Supports rotating elements. |
| Plain bearing | soft | Clutch | Enables Clutch: Supports rotating elements. |
| Plain bearing | hard | Drive shaft | Supports rotation. |
| Plain bearing | hard | Drive shaft | Enables Drive shaft: Supports rotation. |
| Plain bearing | hard | Lathe | Supports spindle rotation. |
| Plain bearing | hard | Lathe | Enables Lathe: Supports spindle rotation. |
| Plain bearing | enables | Potter's wheel | Smooth rotation improves wheel control and durability. |
| Plain bearing | soft | Potter's wheel | Improves smoothness and reduces wear. |
| Plain bearing | hard | Rolling mill | Supports heavy rotating rolls. |
| Plain bearing | hard | Rolling mill | Enables Rolling mill: Supports heavy rotating rolls. |
| Plain bearing | hard | Steering gear | Supports pivots and shafts. |
| Plain bearing | hard | Steering gear | Enables Steering gear: Supports pivots and shafts. |
| Plain bearing | soft | Water pump | Supports rotating or sliding pump parts. |
| Plain bearing | soft | Water pump | Enables Water pump: Supports rotating or sliding pump parts. |
| Planetary transmission | hard | Ford Model T | Gives the early driver controllable speed ranges without a sliding-gear gearbox. |
| Planetary transmission | hard | Ford Model T | Enables Ford Model T: Gives the early driver controllable speed ranges without a sliding-gear gearbox. |
| Plumb line | measurement | Alignment checking | Plumb lines are direct alignment tools. |
| Plumb line | measurement | Technical drawing | Vertical reference lines support layout and teaching. |
| Pneumatic tire | hard | Ford Model T | Carries road shock and gives usable traction. |
| Pneumatic tire | hard | Ford Model T | Enables Ford Model T: Carries road shock and gives usable traction. |
| Poppet valve | hard | Internal combustion engine | Controls gas exchange. |
| Poppet valve | hard | Internal combustion engine | Enables Internal combustion engine: Controls gas exchange. |
| Pressure measurement | test | Pneumatic tire | Checks inflation and leakage. |
| Proof Load Test | test | Band brake | Checks linkages and anchors before road use. |
| Proof Load Test | test | Band brake | Enables Band brake: Checks linkages and anchors before road use. |
| Proof Load Test | test | Leaf spring | Checks resilience and permanent set. |
| Proof Load Test | test | Leaf spring | Enables Leaf spring: Checks resilience and permanent set. |
| Proof Load Test | safety | Stamping press | Checks press and die integrity. |
| Proof Load Test | safety | Stamping press | Enables Stamping press: Checks press and die integrity. |
| Public safety | soft | Dyeing | Public safety provides a necessary starting point for repeatable work. |
| Public safety | soft | Dyeing | Enables Dyeing: Public safety provides a necessary starting point for repeatable work. |
| Public safety | safety | Oil refining | Keeps fire, vapor, and waste risks governed. |
| Public safety | safety | Oil refining | Enables Oil refining: Keeps fire, vapor, and waste risks governed. |
| Public safety | soft | Soap | Public safety provides a necessary starting point for repeatable work. |
| Public safety | soft | Soap | Enables Soap: Public safety provides a necessary starting point for repeatable work. |
| Public safety | soft | Tanning | Public safety provides a necessary starting point for repeatable work. |
| Public safety | soft | Tanning | Enables Tanning: Public safety provides a necessary starting point for repeatable work. |
| Pulley | optional | Simple pump | Lifting and tension systems support pump construction and maintenance. |
| Quality-control records | soft | Band brake | Tracks adjustment and wear. |
| Quality-control records | soft | Band brake | Enables Band brake: Tracks adjustment and wear. |
| Quality-control records | test | Factory assembly line | Tracks defects and rework. |
| Quality-control records | test | Factory assembly line | Enables Factory assembly line: Tracks defects and rework. |
| Quality-control records | institutional | Ford Model T | Keeps defects traceable across a large factory. |
| Quality-control records | institutional | Ford Model T | Enables Ford Model T: Keeps defects traceable across a large factory. |
| Quality-control records | test | Gasoline | Tracks source, contamination, and engine behavior. |
| Quality-control records | test | Gasoline | Enables Gasoline: Tracks source, contamination, and engine behavior. |
| Quality-control records | institutional | Interchangeable parts | Tracks batches, defects, and changes. |
| Quality-control records | institutional | Interchangeable parts | Enables Interchangeable parts: Tracks batches, defects, and changes. |
| Quality-control records | test | Lead-acid battery | Tracks charging behavior and failures. |
| Quality-control records | test | Lead-acid battery | Enables Lead-acid battery: Tracks charging behavior and failures. |
| Quality-control records | test | Mild steel | Tracks heats, suppliers, and defects. |
| Quality-control records | test | Mild steel | Enables Mild steel: Tracks heats, suppliers, and defects. |
| Quality-control records | test | Petroleum | Tracks source and contamination differences. |
| Quality-control records | test | Petroleum | Enables Petroleum: Tracks source and contamination differences. |
| Quality-control records | institutional | Service manual | Feeds known faults and revisions back into service practice. |
| Quality-control records | institutional | Service manual | Enables Service manual: Feeds known faults and revisions back into service practice. |
| Quality-control records | test | Spark ignition | Tracks intermittent faults and replacements. |
| Quality-control records | test | Spark ignition | Enables Spark ignition: Tracks intermittent faults and replacements. |
| Quality-control records | test | Vulcanized rubber | Tracks batches, aging, and failures. |
| Quality-control records | test | Vulcanized rubber | Enables Vulcanized rubber: Tracks batches, aging, and failures. |
| Radiator | safety | Gasoline engine | Rejects engine heat to air. |
| Radiator | safety | Gasoline engine | Enables Gasoline engine: Rejects engine heat to air. |
| Resin | hard | Pitch | Resin provides a necessary starting point for this page. |
| Resin | hard | Pitch | Enables Pitch: Resin provides a necessary starting point for this page. |
| Riveting | soft | Chassis frame | Joins plates and brackets where welding is not available. |
| Road Building | soft | Ford Model T | Provides surfaces suitable for repeated driving and delivery. |
| Road Building | soft | Ford Model T | Enables Ford Model T: Provides surfaces suitable for repeated driving and delivery. |
| Rolling mill | refining | Sheet steel | Reduces metal to controlled thickness. |
| Rolling mill | refining | Sheet steel | Enables Sheet steel: Reduces metal to controlled thickness. |
| Rope making | material_source | Pulley | Supplies the flexible tension member. |
| Rope making | refining | Rope | Turns prepared fibers into usable cordage. |
| Rope making | refining | Rope | Turns loose fiber into usable rope. |
| Rope | hard | Clamp | Rope provides a necessary starting point for this page. |
| Rope | hard | Clamp | Enables Clamp: Rope provides a necessary starting point for this page. |
| Rope | hard | Knot tying | Rope provides a necessary starting point for this page. |
| Rope | hard | Knot tying | Enables Knot tying: Rope provides a necessary starting point for this page. |
| Rope | hard | Lashing | Rope provides a necessary starting point for this page. |
| Rope | hard | Lashing | Enables Lashing: Rope provides a necessary starting point for this page. |
| Rope | material_source | Paper | Cordage and rag fibers teach fiber preparation and can become feedstock. |
| Rope | material_source | Paper | Enables Paper: Cordage and rag fibers teach fiber preparation and can become feedstock. |
| Rope | material_source | Plumb line | A flexible line is the main component. |
| Rope | material_source | Plumb line | Enables Plumb line: A flexible line is the main component. |
| Rope | hard | Pulley | Carries the tension through the pulley. |
| Rope | hard | Pulley | A pulley needs a flexible tension member. |
| Rope | optional | Wheel and axle | Useful for windlasses, carts, and load handling around the axle. |
| Rope | optional | Wheel and axle | Rope enables windlass and cart hauling applications. |
| Rubber curing | refining | Vulcanized rubber | Changes rubber properties under controlled processing. |
| Sanitation norms | institutional | Paper | Administrative records and notices increase demand for cheap writing surfaces. |
| Sanitation norms | hard | Public safety | Sanitation norms provides a necessary starting point for this page. |
| Sanitation norms | hard | Public safety | Enables Public safety: Sanitation norms provides a necessary starting point for this page. |
| Saw | hard | Saw pit | Saw provides a necessary starting point for this page. |
| Saw | hard | Saw pit | Enables Saw pit: Saw provides a necessary starting point for this page. |
| Scratch hardness test | test | Ball bearing | Screens hardness and wear. |
| Scratch hardness test | test | Ball bearing | Enables Ball bearing: Screens hardness and wear. |
| Scratch hardness test | soft | Bog Iron | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Bog Iron | Enables Bog Iron: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Copper Ore | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Copper Ore | Enables Copper Ore: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Glass Sand | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Glass Sand | Enables Glass Sand: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | test | Go/no-go gauge | Screens gauge material durability. |
| Scratch hardness test | test | Go/no-go gauge | Enables Go/no-go gauge: Screens gauge material durability. |
| Scratch hardness test | soft | Gravel | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Gravel | Enables Gravel: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Iron Ore | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Iron Ore | Enables Iron Ore: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Lead Ore | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Lead Ore | Enables Lead Ore: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Limestone | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Limestone | Enables Limestone: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | test | Piston and cylinder | Screens materials for wear resistance. |
| Scratch hardness test | test | Piston and cylinder | Enables Piston and cylinder: Screens materials for wear resistance. |
| Scratch hardness test | soft | Potash | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Potash | Enables Potash: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Sand | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Sand | Enables Sand: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Sandstone | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Sandstone | Enables Sandstone: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Shell Lime | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Shell Lime | Enables Shell Lime: Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Tin Ore | Scratch hardness test provides a necessary starting point for repeatable work. |
| Scratch hardness test | soft | Tin Ore | Enables Tin Ore: Scratch hardness test provides a necessary starting point for repeatable work. |
| Seasonal Calendar | soft | Crop Rotation | Seasonal Calendar provides a necessary starting point for repeatable work. |
| Seasonal Calendar | soft | Crop Rotation | Enables Crop Rotation: Seasonal Calendar provides a necessary starting point for repeatable work. |
| Seasonal Calendar | soft | Seed Selection | Seasonal Calendar provides a necessary starting point for repeatable work. |
| Seasonal Calendar | soft | Seed Selection | Enables Seed Selection: Seasonal Calendar provides a necessary starting point for repeatable work. |
| Sheet metal working | tooling | Radiator | Forms tanks, fins, and ducts. |
| Sheet metal working | tooling | Sheet steel | Cuts, bends, and joins sheet into parts. |
| Sheet steel | hard | Fuel tank | Provides tank and bracket stock. |
| Sheet steel | hard | Fuel tank | Enables Fuel tank: Provides tank and bracket stock. |
| Sheet steel | hard | Stamping press | Provides workable sheet stock. |
| Sheet steel | hard | Stamping press | Enables Stamping press: Provides workable sheet stock. |
| Sieve | hard | Sieve grading | Sieve provides a necessary starting point for this page. |
| Sieve | hard | Sieve grading | Enables Sieve grading: Sieve provides a necessary starting point for this page. |
| Simple pump | hard | Water pump | Provides the basic fluid-moving pattern. |
| Soldering | soft | Radiator | Joins thin metal cooling parts. |
| Spark ignition | hard | Internal combustion engine | Provides timed ignition for light-fuel engines. |
| Spark ignition | hard | Internal combustion engine | Enables Internal combustion engine: Provides timed ignition for light-fuel engines. |
| Spark plug | hard | Gasoline engine | Delivers ignition inside the cylinder. |
| Spark plug | hard | Gasoline engine | Enables Gasoline engine: Delivers ignition inside the cylinder. |
| Spark plug | hard | Spark ignition | Delivers the spark across an insulated gap. |
| Spark plug | hard | Spark ignition | Enables Spark ignition: Delivers the spark across an insulated gap. |
| Spindle | soft | Hemp Fiber | Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Hemp Fiber | Enables Hemp Fiber: Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Linen Thread | Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Linen Thread | Enables Linen Thread: Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Nettle Fiber | Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Nettle Fiber | Enables Nettle Fiber: Spindle provides a necessary starting point for repeatable work. |
| Spindle | tooling | Rope making | Spinning habits improve twist control for small cordage. |
| Spindle | hard | Spinning | Spindle provides a necessary starting point for this page. |
| Spindle | hard | Spinning | Enables Spinning: Spindle provides a necessary starting point for this page. |
| Spindle | tooling | Weaving | Spindles help make longer, more even thread. |
| Spindle | tooling | Weaving | Spindles produce longer thread for woven textiles. |
| Spindle | soft | Wool Yarn | Spindle provides a necessary starting point for repeatable work. |
| Spindle | soft | Wool Yarn | Enables Wool Yarn: Spindle provides a necessary starting point for repeatable work. |
| Spoked wheel | enables | Bicycle | Light wheels make rider-powered transport much more plausible. |
| Spoked wheel | hard | Bicycle | Makes wheels light enough for human-powered transport. |
| Spoked wheel | enables | Cart | Lighter wheels reduce draft effort and improve speed. |
| Spoked wheel | soft | Pneumatic tire | Provides a light wheel foundation. |
| Spoked wheel | soft | Pneumatic tire | Enables Pneumatic tire: Provides a light wheel foundation. |
| Spring making | hard | Poppet valve | Returns the valve closed after actuation. |
| Spring steel | material_source | Leaf spring | Provides resilient metal stock. |
| Standard weights | measurement | Factory assembly line | Supports material and batch consistency. |
| Standard weights | measurement | Factory assembly line | Enables Factory assembly line: Supports material and batch consistency. |
| Standard weights | measurement | Go/no-go gauge | Supports standardization culture. |
| Standard weights | measurement | Go/no-go gauge | Enables Go/no-go gauge: Supports standardization culture. |
| Standard weights | measurement | Kiln | Helps compare shrinkage, fuel use, and test piece batches. |
| Standard weights | measurement | Kiln | Enables Kiln: Helps compare shrinkage, fuel use, and test piece batches. |
| Standard weights | measurement | Mild steel | Supports batch and charge consistency. |
| Standard weights | measurement | Mild steel | Enables Mild steel: Supports batch and charge consistency. |
| Standard weights | optional | Plumb line | Standardized weights improve repeatability, though any compact weight can work. |
| Standard weights | optional | Plumb line | Enables Plumb line: Standardized weights improve repeatability, though any compact weight can work. |
| Standard weights | measurement | Technical drawing | Weights support scale, material callouts, and quality records. |
| Standard weights | optional | Technical drawing | Measurement culture supports drawing discipline, though length standards are the direct need. |
| Standard weights | measurement | Tensile test | Known loads make tests repeatable. |
| Standard weights | measurement | Tensile test | Repeatable loads improve material tests. |
| Standard weights | measurement | Threaded fastener | Supports metal batch consistency. |
| Standard weights | measurement | Threaded fastener | Enables Threaded fastener: Supports metal batch consistency. |
| Steelmaking | refining | Mild steel | Controls carbon and impurities. |
| Steering gear | hard | Automobile | Turns front wheels predictably. |
| Steering gear | hard | Automobile | Enables Automobile: Turns front wheels predictably. |
| Stone hammer | soft | Chisel | Stone hammer provides a necessary starting point for this page. |
| Stone hammer | soft | Chisel | Enables Chisel: Stone hammer provides a necessary starting point for this page. |
| Stone hammer | tooling | Clay | Crushing and mixing temper or dried clay benefits from striking tools. |
| Stone hammer | tooling | Cutting edge | Striking tools help make and renew simple edges. |
| Stone hammer | tooling | Cutting edge | Hammerstones help shape and refresh simple stone or bone edges. |
| Stone hammer | soft | Flint | Stone hammer provides a necessary starting point for this page. |
| Stone hammer | soft | Flint | Enables Flint: Stone hammer provides a necessary starting point for this page. |
| Stone hammer | tooling | Hand drill | Rough parts and sockets can be shaped by striking and abrasion. |
| Stone hammer | tooling | Hand drill | Hammerstones help make rough drill parts and sockets. |
| Stone hammer | soft | Mortar and pestle | Stone hammer provides a necessary starting point for this page. |
| Stone hammer | soft | Mortar and pestle | Enables Mortar and pestle: Stone hammer provides a necessary starting point for this page. |
| Stone hammer | soft | Stone | Stone hammer provides a necessary starting point for this page. |
| Stone hammer | soft | Stone | Enables Stone: Stone hammer provides a necessary starting point for this page. |
| Stone | hard | Bog Iron | Stone provides a necessary starting point for first trials. |
| Stone | hard | Bog Iron | Enables Bog Iron: Stone provides a necessary starting point for first trials. |
| Stone | hard | Chalk | Stone provides a necessary starting point for this page. |
| Stone | hard | Chalk | Enables Chalk: Stone provides a necessary starting point for this page. |
| Stone | hard | Copper Ore | Stone provides a necessary starting point for first trials. |
| Stone | hard | Copper Ore | Enables Copper Ore: Stone provides a necessary starting point for first trials. |
| Stone | hard | Flint | Stone provides a necessary starting point for this page. |
| Stone | hard | Flint | Enables Flint: Stone provides a necessary starting point for this page. |
| Stone | hard | Glass Sand | Stone provides a necessary starting point for first trials. |
| Stone | hard | Glass Sand | Enables Glass Sand: Stone provides a necessary starting point for first trials. |
| Stone | hard | Gravel | Stone provides a necessary starting point for first trials. |
| Stone | hard | Gravel | Enables Gravel: Stone provides a necessary starting point for first trials. |
| Stone | hard | Iron Ore | Stone provides a necessary starting point for first trials. |
| Stone | hard | Iron Ore | Enables Iron Ore: Stone provides a necessary starting point for first trials. |
| Stone | hard | Lead Ore | Stone provides a necessary starting point for first trials. |
| Stone | hard | Lead Ore | Enables Lead Ore: Stone provides a necessary starting point for first trials. |
| Stone | hard | Limestone | Stone provides a necessary starting point for first trials. |
| Stone | hard | Limestone | Enables Limestone: Stone provides a necessary starting point for first trials. |
| Stone | hard | Mortar and pestle | Stone provides a necessary starting point for this page. |
| Stone | hard | Mortar and pestle | Enables Mortar and pestle: Stone provides a necessary starting point for this page. |
| Stone | hard | Potash | Stone provides a necessary starting point for first trials. |
| Stone | hard | Potash | Enables Potash: Stone provides a necessary starting point for first trials. |
| Stone | hard | Quern | Stone provides a necessary starting point for this page. |
| Stone | hard | Quern | Enables Quern: Stone provides a necessary starting point for this page. |
| Stone | hard | Sand | Stone provides a necessary starting point for first trials. |
| Stone | hard | Sand | Enables Sand: Stone provides a necessary starting point for first trials. |
| Stone | hard | Sandstone | Stone provides a necessary starting point for first trials. |
| Stone | hard | Sandstone | Enables Sandstone: Stone provides a necessary starting point for first trials. |
| Stone | hard | Scratch hardness test | Stone provides a necessary starting point for this page. |
| Stone | hard | Scratch hardness test | Enables Scratch hardness test: Stone provides a necessary starting point for this page. |
| Stone | hard | Shell Lime | Stone provides a necessary starting point for first trials. |
| Stone | hard | Shell Lime | Enables Shell Lime: Stone provides a necessary starting point for first trials. |
| Stone | hard | Tin Ore | Stone provides a necessary starting point for first trials. |
| Stone | hard | Tin Ore | Enables Tin Ore: Stone provides a necessary starting point for first trials. |
| Storage jar | soft | Brine | Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Brine | Enables Brine: Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Granary | Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Granary | Enables Granary: Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Salt | Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Salt | Enables Salt: Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Threshing | Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Threshing | Enables Threshing: Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Winnowing | Storage Jar provides a necessary starting point for repeatable work. |
| Storage jar | soft | Winnowing | Enables Winnowing: Storage Jar provides a necessary starting point for repeatable work. |
| Straightedge | test | Drill press | Checks table and guide alignment. |
| Straightedge | test | Drill press | Enables Drill press: Checks table and guide alignment. |
| Straightedge | test | Lathe | Checks ways and alignment. |
| Straightedge | test | Lathe | Enables Lathe: Checks ways and alignment. |
| Tally Stick | alternative | Quality-control records | Provides a low-literacy counting fallback. |
| Tally Stick | alternative | Quality-control records | Enables Quality-control records: Provides a low-literacy counting fallback. |
| Technical drawing | optional | Alignment checking | Drawings define the intended line before the test checks it. |
| Technical drawing | optional | Alignment checking | Enables Alignment checking: Drawings define the intended line before the test checks it. |
| Technical drawing | soft | Automobile | Keeps geometry and revisions reproducible. |
| Technical drawing | soft | Automobile | Enables Automobile: Keeps geometry and revisions reproducible. |
| Technical drawing | soft | Bicycle | Helps a workshop copy frame geometry and improve revisions. |
| Technical drawing | soft | Bicycle | Enables Bicycle: Helps a workshop copy frame geometry and improve revisions. |
| Technical drawing | soft | Camshaft | Records lobe order and timing relationships. |
| Technical drawing | soft | Camshaft | Enables Camshaft: Records lobe order and timing relationships. |
| Technical drawing | soft | Chassis frame | Preserves hole patterns and dimensions between builds. |
| Technical drawing | soft | Chassis frame | Enables Chassis frame: Preserves hole patterns and dimensions between builds. |
| Technical drawing | soft | Gear cutting | Records tooth counts and centers. |
| Technical drawing | soft | Gear cutting | Enables Gear cutting: Records tooth counts and centers. |
| Technical drawing | knowledge | Go/no-go gauge | Defines the accepted limits. |
| Technical drawing | knowledge | Go/no-go gauge | Enables Go/no-go gauge: Defines the accepted limits. |
| Technical drawing | knowledge | Interchangeable parts | Defines shapes and tolerances. |
| Technical drawing | knowledge | Interchangeable parts | Enables Interchangeable parts: Defines shapes and tolerances. |
| Technical drawing | optional | Pulley | Drawings help groove shape and frame alignment. |
| Technical drawing | knowledge | Service manual | Explains assemblies and part locations. |
| Technical drawing | knowledge | Service manual | Enables Service manual: Explains assemblies and part locations. |
| Technical drawing | soft | Spark ignition | Records wiring and timing relationships. |
| Technical drawing | soft | Spark ignition | Enables Spark ignition: Records wiring and timing relationships. |
| Technical drawing | optional | Wheel and axle | Drawings improve hub, axle, and frame repeatability. |
| Technical drawing | optional | Woodworking | Drawings help repeat parts and teach joinery once the workshop grows. |
| Technical drawing | optional | Woodworking | Enables Woodworking: Drawings help repeat parts and teach joinery once the workshop grows. |
| Temperature measurement | measurement | Oil refining | Monitors process zones and product consistency. |
| Tensile test | soft | Knot tying | Tensile test provides a necessary starting point for this page. |
| Tensile test | soft | Knot tying | Enables Knot tying: Tensile test provides a necessary starting point for this page. |
| Tensile test | safety | Pulley | Lifting systems need proof-tested rope and fittings. |
| Tensile test | test | Rope making | Pull testing reveals whether the process makes useful cordage. |
| Tensile test | test | Rope making | Enables Rope making: Pull testing reveals whether the process makes useful cordage. |
| Tensile test | test | Rope | Even crude pull tests separate useful cordage from decorative string. |
| Tensile test | test | Rope | Cordage needs proof and comparison. |
| Tensile test | soft | Sinew | Tensile test provides a necessary starting point for this page. |
| Tensile test | soft | Sinew | Enables Sinew: Tensile test provides a necessary starting point for this page. |
| Tensile test | optional | Spoked wheel | Useful for checking lashings, ties, or later wire spokes. |
| Tensile test | optional | Spoked wheel | Enables Spoked wheel: Useful for checking lashings, ties, or later wire spokes. |
| Tensile test | optional | Woodworking | Pull tests help compare lashings, pegs, and joints. |
| Tensile test | optional | Woodworking | Enables Woodworking: Pull tests help compare lashings, pegs, and joints. |
| Threaded fastener | soft | Drive shaft | Secures couplings and joints. |
| Threaded fastener | soft | Drive shaft | Enables Drive shaft: Secures couplings and joints. |
| Threaded fastener | soft | Fuel tank | Secures fittings and mounts. |
| Threaded fastener | soft | Fuel tank | Enables Fuel tank: Secures fittings and mounts. |
| Threaded fastener | hard | Spark plug | Lets the plug seal and be replaced. |
| Threaded fastener | hard | Spark plug | Enables Spark plug: Lets the plug seal and be replaced. |
| Timber seasoning | material_source | Cart | Stable timber reduces twisting in vehicle frames and axle supports. |
| Timber seasoning | soft | Straightedge | Timber seasoning provides a necessary starting point for this page. |
| Timber seasoning | soft | Straightedge | Enables Straightedge: Timber seasoning provides a necessary starting point for this page. |
| Timber seasoning | material_source | Woodworking | Seasoned stock improves joinery, wheels, handles, and frames. |
| Timber seasoning | soft | Workbench | Timber seasoning provides a necessary starting point for this page. |
| Timber seasoning | soft | Workbench | Enables Workbench: Timber seasoning provides a necessary starting point for this page. |
| Timber | soft | Axe | Timber provides a necessary starting point for this page. |
| Timber | soft | Axe | Enables Axe: Timber provides a necessary starting point for this page. |
| Timber | hard | Bark Fiber | Timber provides a necessary starting point for first trials. |
| Timber | hard | Bark Fiber | Enables Bark Fiber: Timber provides a necessary starting point for first trials. |
| Timber | hard | Bark | Timber provides a necessary starting point for first trials. |
| Timber | hard | Bark | Enables Bark: Timber provides a necessary starting point for first trials. |
| Timber | hard | Birch Bark | Timber provides a necessary starting point for first trials. |
| Timber | hard | Birch Bark | Enables Birch Bark: Timber provides a necessary starting point for first trials. |
| Timber | hard | Hardwood | Timber provides a necessary starting point for first trials. |
| Timber | hard | Hardwood | Enables Hardwood: Timber provides a necessary starting point for first trials. |
| Timber | soft | Loom | Timber provides a necessary starting point for this page. |
| Timber | soft | Loom | Enables Loom: Timber provides a necessary starting point for this page. |
| Timber | soft | Saw | Timber provides a necessary starting point for this page. |
| Timber | soft | Saw | Enables Saw: Timber provides a necessary starting point for this page. |
| Timber | hard | Softwood | Timber provides a necessary starting point for first trials. |
| Timber | hard | Softwood | Enables Softwood: Timber provides a necessary starting point for first trials. |
| Timber | material_source | Timber seasoning | Seasoning begins with suitable wood stock. |
| Timber | material_source | Timber seasoning | Seasoning starts with timber selected for grain, size, and defects. |
| Timber | material_source | Woodworking | Woodworking depends on selected, sound, workable wood. |
| Trade network | institutional | Petroleum | Moves petroleum from source regions to workshops. |
| Trade network | institutional | Vulcanized rubber | Connects tropical rubber sources to industrial factories. |
| Transmission | hard | Planetary transmission | Provides the power-transfer role. |
| Transmission | hard | Planetary transmission | Enables Planetary transmission: Provides the power-transfer role. |
| Try-square | measurement | Alignment checking | Squares check whether assemblies remain true. |
| Try-square | soft | Mortise and tenon | Try-square provides a necessary starting point for this page. |
| Try-square | soft | Mortise and tenon | Enables Mortise and tenon: Try-square provides a necessary starting point for this page. |
| Try-square | measurement | Technical drawing | Right-angle tools make drawings and templates more dependable. |
| Viscosity comparison | test | Lubricating oil | Screens flow and film behavior without modern instruments. |
| Vulcanized rubber | hard | Pneumatic tire | Provides durable elastic tire material. |
| Vulcanized rubber | hard | Pneumatic tire | Enables Pneumatic tire: Provides durable elastic tire material. |
| Water-jacket cooling | safety | Internal combustion engine | Removes heat to protect moving parts. |
| Water-jacket cooling | safety | Internal combustion engine | Enables Internal combustion engine: Removes heat to protect moving parts. |
| Water-jacket cooling | hard | Radiator | Defines the engine cooling loop. |
| Water-jacket cooling | hard | Radiator | Enables Radiator: Defines the engine cooling loop. |
| Water pump | soft | Water-jacket cooling | Can force circulation where thermosiphon is insufficient. |
| Water pump | soft | Water-jacket cooling | Enables Water-jacket cooling: Can force circulation where thermosiphon is insufficient. |
| Water settling test | test | Abrasive grit | Settling and washing help sort grit by size and remove clay or silt. |
| Water settling test | test | Abrasive grit | Settling helps remove mud and sort grit by size. |
| Water settling test | test | Ceramic temper | Settling helps sort and compare fine additions. |
| Water settling test | test | Ceramic temper | Settling helps compare sand, grog, and other additions. |
| Water settling test | soft | Chalk | Water settling test provides a necessary starting point for this page. |
| Water settling test | soft | Chalk | Enables Chalk: Water settling test provides a necessary starting point for this page. |
| Water settling test | test | Clay | Separates clay-rich fines from sand, silt, and organic debris. |
| Water settling test | test | Clay | Settling helps identify and refine clay-rich sediment. |
| Water settling test | hard | Ochre | Water settling test provides a necessary starting point for this page. |
| Water settling test | hard | Ochre | Enables Ochre: Water settling test provides a necessary starting point for this page. |
| Water settling test | test | Paper | Helps separate pulp quality and grit. |
| Water settling test | test | Paper | Enables Paper: Helps separate pulp quality and grit. |
| Water settling test | soft | Sieve grading | Water settling test provides a necessary starting point for this page. |
| Water settling test | soft | Sieve grading | Enables Sieve grading: Water settling test provides a necessary starting point for this page. |
| Water settling test | hard | Stone | Water settling test provides a necessary starting point for this page. |
| Water settling test | hard | Stone | Enables Stone: Water settling test provides a necessary starting point for this page. |
| Water settling test | soft | Wood ash | Water settling test provides a necessary starting point for this page. |
| Water settling test | soft | Wood ash | Enables Wood ash: Water settling test provides a necessary starting point for this page. |
| Water | soft | Barrel | Water provides a necessary starting point for repeatable work. |
| Water | soft | Barrel | Enables Barrel: Water provides a necessary starting point for repeatable work. |
| Water | hard | Brine | Water provides a necessary starting point for first trials. |
| Water | hard | Brine | Enables Brine: Water provides a necessary starting point for first trials. |
| Water | soft | Bucket | Water provides a necessary starting point for repeatable work. |
| Water | soft | Bucket | Enables Bucket: Water provides a necessary starting point for repeatable work. |
| Water | material_source | Clay | Clay processing needs water for slaking, settling, forming, and tests. |
| Water | soft | Coopering | Water provides a necessary starting point for repeatable work. |
| Water | soft | Coopering | Enables Coopering: Water provides a necessary starting point for repeatable work. |
| Water | hard | Dyeing | Water provides a necessary starting point for first trials. |
| Water | hard | Dyeing | Enables Dyeing: Water provides a necessary starting point for first trials. |
| Water | safety | Firekeeping | Water or wet material helps control accidental spread where available. |
| Water | safety | Firekeeping | Enables Firekeeping: Water or wet material helps control accidental spread where available. |
| Water | hard | Flaxseed Oil | Water provides a necessary starting point for first trials. |
| Water | hard | Flaxseed Oil | Enables Flaxseed Oil: Water provides a necessary starting point for first trials. |
| Water | material_source | Hide glue | Glue extraction, cleaning, and use all depend on water. |
| Water | material_source | Hide glue | Enables Hide glue: Glue extraction, cleaning, and use all depend on water. |
| Water | material_source | Ink | Many inks need water for extraction, dispersion, or tool cleaning. |
| Water | hard | Level trough | Water provides a necessary starting point for this page. |
| Water | hard | Level trough | Enables Level trough: Water provides a necessary starting point for this page. |
| Water | hard | Milk Casein | Water provides a necessary starting point for first trials. |
| Water | hard | Milk Casein | Enables Milk Casein: Water provides a necessary starting point for first trials. |
| Water | hard | Oak Gall | Water provides a necessary starting point for first trials. |
| Water | hard | Oak Gall | Enables Oak Gall: Water provides a necessary starting point for first trials. |
| Water | material_source | Paper | Paper making depends on soaking, washing, pulping, and sheet forming. |
| Water | hard | Plant Dye | Water provides a necessary starting point for first trials. |
| Water | hard | Plant Dye | Enables Plant Dye: Water provides a necessary starting point for first trials. |
| Water | hard | Reed | Water provides a necessary starting point for this page. |
| Water | hard | Reed | Enables Reed: Water provides a necessary starting point for this page. |
| Water | hard | Rush | Water provides a necessary starting point for this page. |
| Water | hard | Rush | Enables Rush: Water provides a necessary starting point for this page. |
| Water | hard | Salt | Water provides a necessary starting point for first trials. |
| Water | hard | Salt | Enables Salt: Water provides a necessary starting point for first trials. |
| Water | hard | Soap | Water provides a necessary starting point for first trials. |
| Water | hard | Soap | Enables Soap: Water provides a necessary starting point for first trials. |
| Water | hard | Starch Paste | Water provides a necessary starting point for first trials. |
| Water | hard | Starch Paste | Enables Starch Paste: Water provides a necessary starting point for first trials. |
| Water | hard | Tannin Bark | Water provides a necessary starting point for first trials. |
| Water | hard | Tannin Bark | Enables Tannin Bark: Water provides a necessary starting point for first trials. |
| Water | hard | Tanning | Water provides a necessary starting point for first trials. |
| Water | hard | Tanning | Enables Tanning: Water provides a necessary starting point for first trials. |
| Water | hard | Vinegar | Water provides a necessary starting point for first trials. |
| Water | hard | Vinegar | Enables Vinegar: Water provides a necessary starting point for first trials. |
| Water | material_source | Water-jacket cooling | Provides coolant. |
| Water | material_source | Water-jacket cooling | Enables Water-jacket cooling: Provides coolant. |
| Water | material_source | Water settling test | Water is the separating medium. |
| Water | material_source | Water settling test | Settling tests need clear vessels and water as the separating medium. |
| Water | hard | Willow | Water provides a necessary starting point for this page. |
| Water | hard | Willow | Enables Willow: Water provides a necessary starting point for this page. |
| Waterwheel | alternative | Rolling mill | Can provide early mill power. |
| Weaving | material_source | Bicycle | Woven straps, pads, and tension members can support early prototypes. |
| Weaving | alternative | Leather | Woven straps and cloth can replace leather in some low-wear uses. |
| Weaving | hard | Loom | Weaving provides a necessary starting point for this page. |
| Weaving | hard | Loom | Enables Loom: Weaving provides a necessary starting point for this page. |
| Weaving | hard | Shuttle | Weaving provides a necessary starting point for this page. |
| Weaving | hard | Shuttle | Enables Shuttle: Weaving provides a necessary starting point for this page. |
| Wheel and axle | enables | Bicycle | Later human-powered transport depends on reliable wheels and axles. |
| Wheel and axle | hard | Bicycle | Supplies the rotating transport foundation. |
| Wheel and axle | enables | Cart | The wheel and axle become a load-carrying transport system. |
| Wheel and axle | hard | Cart | Provides the rolling support. |
| Wheel and axle | hard | Plain bearing | Provides the rotating shaft problem that bearings solve. |
| Wheel and axle | hard | Plain bearing | Enables Plain bearing: Provides the rotating shaft problem that bearings solve. |
| Wheel and axle | hard | Potter's wheel | Provides the rotating platform and shaft idea. |
| Wheel and axle | hard | Potter's wheel | Enables Potter's wheel: Provides the rotating platform and shaft idea. |
| Wheel and axle | enables | Pulley | A grooved wheel changes the direction of a rope force. |
| Wheel and axle | hard | Pulley | Provides the rotating sheave and bearing idea. |
| Wheel and axle | hard | Spoked wheel | Supplies the hub, rim, and rolling-load problem. |
| Wheel and axle | hard | Spoked wheel | Enables Spoked wheel: Supplies the hub, rim, and rolling-load problem. |
| Wheel and axle | hard | Steering gear | Provides vehicle wheel geometry. |
| Wheel and axle | hard | Steering gear | Enables Steering gear: Provides vehicle wheel geometry. |
| Wire Drawing | hard | Chain | Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Chain | Enables Chain: Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Hinge | Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Hinge | Enables Hinge: Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Latch | Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Latch | Enables Latch: Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Nail | Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Nail | Enables Nail: Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Rivet | Wire Drawing provides a necessary starting point for first trials. |
| Wire Drawing | hard | Rivet | Enables Rivet: Wire Drawing provides a necessary starting point for first trials. |
| Woodworking | soft | Adze | Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Adze | Enables Adze: Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Animal Harness | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Animal Harness | Enables Animal Harness: Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Barrel | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Barrel | Enables Barrel: Woodworking provides a necessary starting point for first trials. |
| Woodworking | tooling | Bicycle | Enables early wooden frames, wheel parts, jigs, and repair fixtures. |
| Woodworking | tooling | Bicycle | Supports early frames, rims, jigs, and handles. |
| Woodworking | soft | Brickmaking | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Brickmaking | Enables Brickmaking: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | hard | Bucket | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Bucket | Enables Bucket: Woodworking provides a necessary starting point for first trials. |
| Woodworking | tooling | Cart | Builds the frame, bed, axle supports, and handles. |
| Woodworking | tooling | Cart | Supplies the frame, bed, axle supports, and repairs. |
| Woodworking | soft | Clamp | Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Clamp | Enables Clamp: Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Coopering | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Coopering | Enables Coopering: Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Drying rack | Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Drying rack | Enables Drying rack: Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Hoe | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Hoe | Enables Hoe: Woodworking provides a necessary starting point for first trials. |
| Woodworking | soft | Hurdle | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Hurdle | Enables Hurdle: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Level trough | Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Level trough | Enables Level trough: Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Peg joint | Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Peg joint | Enables Peg joint: Woodworking provides a necessary starting point for this page. |
| Woodworking | tooling | Plain bearing | Makes early wooden housings, shafts, and replaceable sleeves. |
| Woodworking | tooling | Plain bearing | Enables Plain bearing: Makes early wooden housings, shafts, and replaceable sleeves. |
| Woodworking | soft | Plastering | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Plastering | Enables Plastering: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | hard | Plow | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Plow | Enables Plow: Woodworking provides a necessary starting point for first trials. |
| Woodworking | tooling | Potter's wheel | Builds the turntable, support frame, and shaft parts. |
| Woodworking | tooling | Potter's wheel | Enables Potter's wheel: Builds the turntable, support frame, and shaft parts. |
| Woodworking | hard | Shovel | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Shovel | Enables Shovel: Woodworking provides a necessary starting point for first trials. |
| Woodworking | soft | Shuttle | Woodworking provides a necessary starting point for this page. |
| Woodworking | soft | Shuttle | Enables Shuttle: Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Sickle | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Sickle | Enables Sickle: Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Sled | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Sled | Enables Sled: Woodworking provides a necessary starting point for first trials. |
| Woodworking | tooling | Spoked wheel | Shapes hub, spokes, rim segments, joints, and repair wedges. |
| Woodworking | tooling | Spoked wheel | Enables Spoked wheel: Shapes hub, spokes, rim segments, joints, and repair wedges. |
| Woodworking | soft | Thatching | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Thatching | Enables Thatching: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Tile Making | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Tile Making | Enables Tile Making: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Wattle and Daub | Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | soft | Wattle and Daub | Enables Wattle and Daub: Woodworking provides a necessary starting point for repeatable work. |
| Woodworking | hard | Wheel and axle | Shape the wheel, axle, hub, and supporting frame. |
| Woodworking | tooling | Wheel and axle | Shapes wheels, hubs, axles, and frames. |
| Woodworking | hard | Workbench | Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Workbench | Enables Workbench: Woodworking provides a necessary starting point for this page. |
| Woodworking | hard | Yoke | Woodworking provides a necessary starting point for first trials. |
| Woodworking | hard | Yoke | Enables Yoke: Woodworking provides a necessary starting point for first trials. |
| Workbench | tooling | Drill press | Supports clamping and layout. |
| Workbench | tooling | Drill press | Enables Drill press: Supports clamping and layout. |
| Workbench | tooling | Lathe | Provides stable support and layout culture. |
| Workbench | tooling | Lathe | Enables Lathe: Provides stable support and layout culture. |
| Workshop organization | soft | Bridge Trestle | Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | soft | Bridge Trestle | Enables Bridge Trestle: Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | soft | Drainage Ditch | Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | soft | Drainage Ditch | Enables Drainage Ditch: Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | institutional | Factory assembly line | Provides task assignment and shared tools. |
| Workshop organization | institutional | Factory assembly line | Enables Factory assembly line: Provides task assignment and shared tools. |
| Workshop organization | soft | Road Building | Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | soft | Road Building | Enables Road Building: Workshop Organization provides a necessary starting point for repeatable work. |
| Workshop organization | soft | Saw pit | Workshop organization provides a necessary starting point for this page. |
| Workshop organization | soft | Saw pit | Enables Saw pit: Workshop organization provides a necessary starting point for this page. |
| Workshop records | knowledge | Apprenticeship | Records help turn teaching into repeatable curriculum. |
| Workshop records | optional | Apprenticeship | Written or mnemonic records strengthen training but are not mandatory. |
| Workshop records | hard | Batch labeling | Workshop records provides a necessary starting point for this page. |
| Workshop records | hard | Batch labeling | Enables Batch labeling: Workshop records provides a necessary starting point for this page. |
| Workshop records | soft | Beeswax | Workshop records provides a necessary starting point for this page. |
| Workshop records | soft | Beeswax | Enables Beeswax: Workshop records provides a necessary starting point for this page. |
| Workshop records | hard | Crop Rotation | Workshop records provides a necessary starting point for first trials. |
| Workshop records | hard | Crop Rotation | Enables Crop Rotation: Workshop records provides a necessary starting point for first trials. |
| Workshop records | soft | Flaxseed Oil | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Flaxseed Oil | Enables Flaxseed Oil: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Milk Casein | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Milk Casein | Enables Milk Casein: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Moisture Test | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Moisture Test | Enables Moisture Test: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Oak Gall | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Oak Gall | Enables Oak Gall: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Plant Dye | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Plant Dye | Enables Plant Dye: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Proof Load Test | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Proof Load Test | Enables Proof Load Test: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Public safety | Workshop records provides a necessary starting point for this page. |
| Workshop records | soft | Public safety | Enables Public safety: Workshop records provides a necessary starting point for this page. |
| Workshop records | institutional | Quality-control records | Provides durable production notes. |
| Workshop records | institutional | Quality-control records | Enables Quality-control records: Provides durable production notes. |
| Workshop records | hard | Seed Selection | Workshop records provides a necessary starting point for first trials. |
| Workshop records | hard | Seed Selection | Enables Seed Selection: Workshop records provides a necessary starting point for first trials. |
| Workshop records | institutional | Standard weights | Standards need records of masters, copies, and checks. |
| Workshop records | soft | Starch Paste | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Starch Paste | Enables Starch Paste: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Tannin Bark | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Tannin Bark | Enables Tannin Bark: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | institutional | Technical drawing | Drawing archives depend on storage and retrieval habits. |
| Workshop records | soft | Vinegar | Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Vinegar | Enables Vinegar: Workshop records provides a necessary starting point for repeatable work. |
| Workshop records | soft | Workshop organization | Workshop records provides a necessary starting point for this page. |
| Workshop records | soft | Workshop organization | Enables Workshop organization: Workshop records provides a necessary starting point for this page. |
| Writing | soft | Batch labeling | Writing provides a necessary starting point for this page. |
| Writing | soft | Batch labeling | Enables Batch labeling: Writing provides a necessary starting point for this page. |
| Writing | soft | Clay tablet records | Writing provides a necessary starting point for this page. |
| Writing | soft | Clay tablet records | Enables Clay tablet records: Writing provides a necessary starting point for this page. |
| Writing | institutional | Ink | Ink is useful when marks need to be repeated and taught. |
| Writing | institutional | Ink | Enables Ink: Ink is useful when marks need to be repeated and taught. |
| Writing | institutional | Paper | Durable demand for records justifies the labor. |
| Writing | institutional | Paper | Writing creates demand for cheap record media. |
| Writing | knowledge | Quality-control records | Allows shared labels and instructions. |
| Writing | knowledge | Quality-control records | Enables Quality-control records: Allows shared labels and instructions. |
| Writing | institutional | Sanitation norms | Written rules and logs help public-health practices persist. |
| Writing | optional | Sanitation norms | Written rules and logs help norms persist across households. |
| Writing | knowledge | Service manual | Enables repeatable instructions. |
| Writing | knowledge | Service manual | Enables Service manual: Enables repeatable instructions. |
| Writing | institutional | Technical drawing | Drawings need labels, dimensions, and revision notes. |
| Writing | knowledge | Technical drawing | Labels, dimensions, and revision notes make drawings durable. |
| Writing | knowledge | Workshop records | Durable records require a writing system or equivalent marks. |
| Writing | knowledge | Workshop records | Enables Workshop records: Durable records require a writing system or equivalent marks. |