The document describes the main components of a computer system including the central processing unit (CPU) which contains the arithmetic logic unit and control unit, primary storage components like read-only memory (ROM) and random access memory (RAM), and input/output devices like keyboards, mice, printers, monitors, and storage devices like hard disks, CD-ROMs, and thumb drives.

2. 


4. CPU

5. Joys
tick

7. 2
1 Arithmetic and logic
unit
2 Control Unit

8. Primary Storage
2
Rom Ram

9. ROM Read-only Memory
nonvolatile
Basic Input output System BIOS

10. RAM Random Access Memory

12. ROM Read-only Memory
nonvolatile

13. output
device

15. Timer

16. <Keypad will appear here
based on shape and location of
this rectangle.>

17. Thump Drive
Ram

18. mouse Hard disk Scanner monitor
Keyboard printer Ram Cd-Rom

19. <Scoreboard will appear here, leave shape as-is.>