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| 控制字符【计】; 控制符 (号); 操作符 | |||
| control character: 48 phrases in 12 subjects |
| Agriculture | 1 |
| Business | 1 |
| Computer networks | 1 |
| Economy | 1 |
| Electronics | 6 |
| Information technology | 18 |
| Multimedia | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 9 |
| Telecommunications | 5 |