 |
| vacant: 51 phrases in 20 subjects |
| Business | 3 |
| Chemistry | 2 |
| Clerical | 2 |
| Computers | 1 |
| Corporate governance | 2 |
| Electronics | 2 |
| Forestry | 2 |
| General | 13 |
| Information technology | 1 |
| International Monetary Fund | 2 |
| Law | 6 |
| Metallurgy | 1 |
| Military | 1 |
| Physics | 2 |
| Radio | 1 |
| Slang | 4 |
| Solid-state physics | 1 |
| Technology | 2 |
| United Nations | 1 |
| Welding | 2 |