 |
| |||
| OSC | |||
| |||
| OSC | |||
| operations: 74 phrases in 13 subjects |
| Abbreviation | 44 |
| Aviation | 1 |
| Business | 2 |
| Communications | 1 |
| Energy industry | 1 |
| General | 6 |
| Military | 10 |
| Oceanography & oceanology | 2 |
| Telecommunications | 1 |
| Trademark | 1 |
| Transport | 1 |
| United Nations | 1 |
| Veterinary medicine | 3 |