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| digital cassettes | |||
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数 字磁带 : 50 phrases in 13 subjects |
| Agriculture | 3 |
| Aviation | 3 |
| Chemistry | 2 |
| Computers | 1 |
| Earth sciences | 10 |
| Electronics | 16 |
| Engineering geology | 1 |
| Geophysics | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Multimedia | 6 |
| Project management | 1 |
| Space | 3 |
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