 |
| signal lights: 95 phrases in 17 subjects |
| Automobiles | 2 |
| British usage, not spelling | 1 |
| Chemistry | 1 |
| Communications | 33 |
| Construction | 4 |
| Economy | 2 |
| Electronics | 5 |
| General | 1 |
| Lighting other than cinema | 1 |
| Nuclear physics | 1 |
| Optics branch of physics | 2 |
| Rail transport | 11 |
| Road works | 1 |
| Telecommunications | 2 |
| Transport | 25 |
| Vacuum tubes | 1 |
| Weapons and gunsmithing | 2 |