| Cold War military computer system of the United States(noun, expression, technology, entity, form) |
| Cole's quadrant(noun, expression, technology, entity, form) |
| Cordwood construction(noun, expression, technology, entity, form) |
| Craig machine(noun, expression, technology, entity, form) |
| Cremona diagram(noun, expression, technology, entity, form) |
| Cryderman mucking machine(noun, expression, technology, entity, form) |
| D'Arsonval galvanometer(noun, expression, technology, entity, form) |
| DM three density meter(noun, expression, technology, entity, form) |
| Dakeyne hydraulic disc engine(noun, expression, technology, entity, form) |
| Daly detector(noun, expression, technology, entity, form) |
| Darlington amplifier(noun, expression, technology, entity, form) |
| Davis quadrant(noun, expression, technology, entity, form) |
| Demaco extruder(noun, expression, technology, entity, form) |
| Derrick drilling machine(noun, expression, technology, entity, form) |
| Diablo Data Systems(noun, expression, technology, entity, form) |
| Digital Interactive Systems Corporation(noun, expression, technology, entity, form) |
| Doherty amplifier(noun, expression, technology, entity, form) |
| Doppler computer system(noun, expression, technology, entity, form) |
| Doppler radar tail warning system(noun, expression, technology, entity, form) |
| Dorry machine(noun, expression, technology, entity, form) |