1. motherboard
2. ram
3. key /
4. printer
5. keyboard
6. power supply unit
7. camera
8. mouse board
9. mouse
10. hard drive
11. software
12. hardware
13. expansion slots ( not laptops)g
14. usp
15. fan makes computer cool if it has dirt the computer will be steaming!
16. moniter
17. speaker has cpu case
18. headphone
19. scanner
20. power supply unit

Computer presentation