| Mariner's astrolabe(noun, technology, entity, form, concept) |
| MarsDial(noun, technology, entity, form, concept) |
| Maxwell's thermodynamic surface(noun, technology, entity, form, concept) |
| Meyer locomotive(noun, technology, entity, form, concept) |
| Montreal protocol(noun, technology, entity, form, concept) |
| Moondial(noun, technology, entity, form, concept) |
| Napier's bones(noun, technology, entity, form, concept) |
| Odhner arithmometer(noun, technology, entity, form, concept) |
| Olav Tryggvason(noun, technology, entity, form, concept) |
| Oliver Typewriter Company typewriter(noun, technology, entity, form, concept) |
| Olivetti typewriter(noun, technology, entity, form, concept) |
| Pascal's calculator(noun, technology, entity, form, concept) |
| Peter Mitterhofer typewriter(noun, technology, entity, form, concept) |
| Pythagorean cup(noun, technology, entity, form, concept) |
| Quitsato sundial(noun, technology, entity, form, concept) |
| Ramsden surveying instrument(noun, technology, entity, form, concept) |
| Remington-Rand quiet-riter(noun, technology, entity, form, concept) |
| Royal Typewriter Company typewriter(noun, technology, entity, form, concept) |
| Scheutzian calculation engine(noun, technology, entity, form, concept) |
| Sholes and Glidden typewriter(noun, technology, entity, form, concept) |