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определитель : 77 phrases in 23 subjects |
| Air defense | 1 |
| Astronautics | 2 |
| Astronomy | 1 |
| Automated equipment | 1 |
| Aviation | 3 |
| Business | 1 |
| Chemistry | 1 |
| Computers | 4 |
| Forestry | 1 |
| General | 4 |
| Geography | 1 |
| Librarianship | 2 |
| Mathematics | 22 |
| Meteorology | 1 |
| Microsoft | 1 |
| Mining | 1 |
| Nuclear physics | 3 |
| Oil and gas technology | 1 |
| Patents | 1 |
| Radiation | 8 |
| Surveying | 1 |
| Technology | 15 |
| Telephony | 1 |