|
H : 191 phrases in 24 subjects |
| Agriculture | 1 |
| Antennas and waveguides | 12 |
| Chemistry | 39 |
| Communications | 18 |
| Earth sciences | 22 |
| Ecology | 1 |
| Electronics | 30 |
| Environment | 5 |
| Food industry | 5 |
| Forestry | 2 |
| General | 8 |
| Health care | 9 |
| Industry | 3 |
| Information technology | 3 |
| Life sciences | 3 |
| Mechanic engineering | 1 |
| Medical | 11 |
| Metallurgy | 3 |
| Obsolete / dated | 1 |
| Politics | 1 |
| Power lines | 2 |
| Technology | 6 |
| Telecommunications | 1 |
| Transport | 4 |