The who's and how's
The physical components of the computer or electronic system.
The hard disk is the the computers main storage device that permanently stores all the data on the computer.
CPU - Central Processing Unit
The CPU is in charge of processing the data, like the brain of the computer.
The fan prevents the computer from over heating because if the computer gets too hot then the computer will just stop.
The mother board is the skeleton of the computer and connects everything together.
The sound card helps the computer give out or take in sound.