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electromagnetic radiation : 60 phrases in 16 subjects |
| Air defense | 6 |
| Aviation | 3 |
| Chemistry | 1 |
| Earth sciences | 5 |
| Ecology | 4 |
| Electronics | 9 |
| General | 3 |
| Geophysics | 2 |
| Hydroelectric power stations | 1 |
| Information technology | 3 |
| Nautical | 1 |
| Plastics | 1 |
| Project management | 1 |
| Space | 7 |
| Technology | 11 |
| Telecommunications | 2 |
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