| Man Enters the Cosmos(noun, technology, entity, form, concept) |
| Mariner's astrolabe(noun, technology, entity, form, concept) |
| MarsDial(noun, technology, entity, form, concept) |
| Maxwell's thermodynamic surface(noun, technology, entity, form, concept) |
| Metroplex(noun, name, autobot, transformers) |
| Meyer locomotive(noun, technology, entity, form, concept) |
| Mirage(noun, name, autobot, transformers) |
| Montreal protocol(noun, technology, entity, form, concept) |
| Moondial(noun, technology, entity, form, concept) |
| Moonracer(noun, name, autobot, transformers) |
| Napier's bones(noun, technology, entity, form, concept) |
| Nosecone(noun, name, autobot, transformers) |
| 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) |
| Omega Supreme(noun, name, autobot, transformers) |
| Optimus Prime(noun, name, autobot, transformers) |
| Outback(noun, name, autobot, transformers) |
| Pascal's calculator(noun, technology, entity, form, concept) |