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correcting codes : 99 phrases in 19 subjects |
| Astronautics | 2 |
| Automated equipment | 7 |
| Communications | 1 |
| Computer networks | 6 |
| Computers | 3 |
| Economics | 1 |
| Electronics | 3 |
| Information security and data protection | 4 |
| Information technology | 20 |
| Makarov | 1 |
| Mass media | 5 |
| Mathematics | 9 |
| Military | 3 |
| Nanotechnology | 1 |
| Programming | 6 |
| Quantum electronics | 2 |
| Security systems | 6 |
| Technology | 15 |
| Telecommunications | 4 |