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| An airspace of defined dimensions within which a high volume of pilot training or an unusual type of aerial activity may be carried out | |||
| advisory: 35 phrases in 12 subjects |
| Abbreviation | 13 |
| Accounting | 2 |
| Business | 1 |
| Ecology | 1 |
| Energy industry | 1 |
| International trade | 1 |
| Military | 6 |
| Stock Exchange | 1 |
| Technology | 2 |
| Trademark | 3 |
| University | 2 |
| Veterinary medicine | 2 |