Input or Output?

1. Computer Screen/ Monitor- Output
2. Keyboard- Input
3. Mouse- Input
4. CD/DVD Drive- Input
5. Headphones- Output
6. USB Flash-drive/ Jump-drive: Input/Output
7. Projector- Output
8. Printer- Output
9. Wireless Internet Hub- Input/Output
10. ActiVote- Input
11. ActivBoard Pen- Input