 |
| |||
| multi-frequency dialing (номера) | |||
| touch-tone dialing (oleg.vigodsky) | |||
| многочастотный набор: 18 phrases in 11 subjects |
| Communications | 2 |
| Computer networks | 1 |
| Electronics | 4 |
| General | 1 |
| Information technology | 1 |
| Mass media | 1 |
| Meteorology | 1 |
| Military | 1 |
| Security systems | 1 |
| Technology | 1 |
| Telecommunications | 4 |