The MOST common components in a Personal Computer (PC) are:

1. Motherboard
2. Storage Devices
3. CPU (or Microprocessor)
4. Expansion Slots (part of motherboard)
5. Random Access Memory.
6. Cache Memory (Internal and External)
7. BIOS and CMOS
8. Expansion Boards
9. Keyboard
10. Monitor
11. Other Input Devices
12. Other Output Devices
13. "CHIPSET"
14. Operating System
15. Application Software
16. Person to operate it.

Some individuals say that the most important part of a computer is the "user", or the person operating the PC. I disagree! Why? Because a computer can be operated by anyone with a minimum of skills. But, no computer will function without a basic set of hardware and software components, no matter how skilled or unskilled the user! It is just a matter of what each person thinks.

My course director says it is the "USER" and he has more "Masters" degrees than I do; however, I am writing the course; and, the review and examination are based on the "writer's opinion".

You can determine your own opinion, and no one can totally refute it!