 |
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| beacon | |||
| signal | |||
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signal : 571 phrases in 24 subjects |
| Communications | 132 |
| Earth sciences | 2 |
| Electronics | 292 |
| Environment | 3 |
| General | 4 |
| Health care | 1 |
| Industry | 1 |
| Information technology | 47 |
| Law | 2 |
| Lighting other than cinema | 1 |
| Magnetics | 3 |
| Medical | 6 |
| Microsoft | 1 |
| Patents | 1 |
| Power lines | 10 |
| Radio | 20 |
| Rail transport | 20 |
| Scientific | 1 |
| Sound recording | 1 |
| Technology | 1 |
| Telecommunications | 7 |
| Telegraphy | 4 |
| Telephony | 1 |
| Transport | 10 |