USB transport mode : 24 phrases in 12 subjects |
Air defense | 1 |
Audio electronics | 3 |
Automobiles | 1 |
Computer games | 1 |
Earth sciences | 1 |
Electronics | 2 |
Exhibitions | 2 |
Information technology | 4 |
Librarianship | 2 |
Project management | 5 |
Space | 1 |
Sports | 1 |