A personal computer is made up of multiple physical components of computer hardware, upon which can be installed an operating system and a multitude of software to perform the operator's desired functions.

Hardware of a modern Personal Computer.
1. Monitor
2. Motherboard
3. Processor
4. Hard Disk
5. Ram
6. CD-Rom
7. Optical disc drive
9. Keyboard
10. Mouse

Inside a custom-built computer: the power supply at the bottom has its own cooling fan.Though a PC comes in many different forms, a typical personal computer consists of a case or chassis in a tower shape (desktop), containing components such as a motherboard.