 |
| |||
| open defence | |||
| overt advocacy of something (чего-либо ssn) | |||
| открытая защита: 15 phrases in 12 subjects |
| Astronautics | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Chess | 1 |
| Cryptography | 3 |
| General | 2 |
| Information security and data protection | 1 |
| Laser medicine | 1 |
| Makarov | 1 |
| Oil / petroleum | 1 |
| Security systems | 1 |
| Transport | 1 |