Understanding Power Supply Unit of Computer (PSU)

What is a Power Supply?
Power Supply Unit usually abbreviated as PSU is commonly called an electronic network that serves to convert AC voltage to DC, then passes it to some other computer hardware that requires power, among others such as the motherboard and the CD-ROM. Put the PSU of a computer is usually located in the rear section of casing. Power supply is part of the side that is plugged into the electrical installation while other plugged into the motherboard.