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| 数据键 | |||
| 数据密钥 | |||
|
data key : 42 phrases in 14 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Business | 1 |
| Cryptography | 1 |
| Electronics | 8 |
| Information technology | 10 |
| Librarianship | 2 |
| Mathematics | 5 |
| Multimedia | 1 |
| Securities | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 1 |
| Telecommunications | 6 |