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| primary data | |||
| main data | |||
| general data | |||
| critical data | |||
| key data; major data; principal data; salient date | |||
| 主要数据: 20 phrases in 13 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 4 |
| Business | 1 |
| Computers | 1 |
| Desert science | 1 |
| General | 1 |
| Management | 1 |
| Metallurgy | 1 |
| Plastics | 1 |
| Project management | 3 |
| Securities | 1 |
| Technology | 3 |