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digital signal: 116 phrases in 16 subjects |
Agriculture | 1 |
Air defense | 3 |
Automobiles | 2 |
Aviation | 14 |
Communications | 5 |
Earth sciences | 2 |
Electronics | 33 |
Geophysics | 1 |
Hydroelectric power stations | 1 |
Information technology | 14 |
Multimedia | 4 |
Project management | 1 |
Rail transport | 2 |
Space | 6 |
Technology | 7 |
Telecommunications | 20 |