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perturbation method : 35 phrases in 14 subjects |
| Aerohydrodynamics | 1 |
| Astronautics | 2 |
| Automated equipment | 1 |
| Aviation | 1 |
| General | 4 |
| Makarov | 11 |
| Mass media | 1 |
| Mathematics | 2 |
| Nanotechnology | 2 |
| Nautical | 2 |
| Quantum mechanics | 1 |
| Security systems | 1 |
| Space | 3 |
| Technology | 3 |