signal code : 52 phrases in 15 subjects |
Automated equipment | 1 |
Aviation | 1 |
Communications | 1 |
Computers | 5 |
Electronics | 2 |
Household appliances | 2 |
Information technology | 2 |
Law | 1 |
Mass media | 2 |
Military | 5 |
Nautical | 3 |
Programming | 4 |
Rail transport | 2 |
Technology | 13 |
Telecommunications | 8 |