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| English thesaurus | |||
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| Royal Automobile Club | |||
| R.A: 28 phrases in 17 subjects |
| Abbreviation | 1 |
| Antennas and waveguides | 1 |
| Astronomy | 1 |
| Chemistry | 1 |
| Communications | 4 |
| Construction | 1 |
| Electronics | 2 |
| Environment | 1 |
| General | 2 |
| Insurance | 4 |
| Medical | 1 |
| Microelectronics | 2 |
| Microsoft | 1 |
| Optics branch of physics | 3 |
| Social science | 1 |
| Transport | 1 |
| Vacuum tubes | 1 |