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| English thesaurus | |||
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| ON | |||
| Optical: 113 phrases in 18 subjects |
| Agriculture | 1 |
| Analytical chemistry | 13 |
| Antennas and waveguides | 38 |
| Chemistry | 18 |
| Construction | 13 |
| Economy | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| General | 1 |
| Lighting other than cinema | 9 |
| Mechanics | 1 |
| Microsoft | 3 |
| Photography | 1 |
| Physical sciences | 1 |
| Piezoelectric crystals | 1 |
| Radio | 4 |
| Thermal Energy | 1 |
| Video recording | 4 |