| English thesaurus | |||
| |||
| OCR | |||
|
Operational Control : 25 phrases in 10 subjects |
| Aviation | 1 |
| Business | 1 |
| Communications | 5 |
| Economics | 2 |
| General | 3 |
| Military | 1 |
| Natural resourses and wildlife conservation | 1 |
| Optics branch of physics | 1 |
| Technology | 5 |
| Transport | 5 |
| English thesaurus | |||
| |||
| OCR | |||
|
Operational Control : 25 phrases in 10 subjects |
| Aviation | 1 |
| Business | 1 |
| Communications | 5 |
| Economics | 2 |
| General | 3 |
| Military | 1 |
| Natural resourses and wildlife conservation | 1 |
| Optics branch of physics | 1 |
| Technology | 5 |
| Transport | 5 |