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Contacts : 416 phrases in 43 subjects |
| Antennas and waveguides | 4 |
| Building structures | 1 |
| Chemistry | 43 |
| Commerce | 1 |
| Communications | 1 |
| Construction | 47 |
| Electric machinery | 14 |
| Electric motors | 1 |
| Electric traction | 27 |
| Electrical engineering | 12 |
| Electronics | 61 |
| European Union | 2 |
| Food industry | 2 |
| General | 7 |
| Health care | 6 |
| Human rights activism | 1 |
| Immigration and citizenship | 3 |
| Information technology | 5 |
| Isolation | 5 |
| Law | 3 |
| Magnetics | 4 |
| Mathematics | 1 |
| Mechanics | 1 |
| Medical | 5 |
| Microsoft | 61 |
| Nuclear physics | 1 |
| Obsolete / dated | 1 |
| Oil / petroleum | 1 |
| Photography | 1 |
| Plastics | 2 |
| Politics | 2 |
| Power system protection | 51 |
| Printed circuit boards | 1 |
| Radiobiology | 3 |
| Radiology | 1 |
| Rail transport | 7 |
| Risk Management | 1 |
| Social science | 1 |
| Sound recording | 1 |
| Telecommunications | 1 |
| Transformers | 4 |
| Transport | 18 |
| Welding | 1 |