 |
| unusable: 39 phrases in 22 subjects |
| Aeronautics | 1 |
| Apollo-Soyuz | 1 |
| Astronautics | 1 |
| Aviation | 5 |
| Computers | 1 |
| Construction | 1 |
| Ecology | 2 |
| Electronics | 2 |
| General | 3 |
| Horticulture | 1 |
| Information technology | 4 |
| Makarov | 2 |
| Mathematics | 3 |
| Military | 3 |
| Mining | 1 |
| Nanotechnology | 1 |
| Nautical | 1 |
| Nuclear and fusion power | 1 |
| Oil and gas | 1 |
| Programming | 1 |
| Technology | 2 |
| Transport | 1 |