1. It is the main “brain” or “heart” of a computer system. It performs all of the instructions and calculations that are needed and manages the flow of information through a computer.

2. It contains all the circuits and components that run the computer.

3. 3. Enables the computer to use a peripheral device for which it does not have the necessary connections or circuit boards. They are often used to permit upgrading to a new different hardware.

4. Installed in the back corner of the PC case, next to the motherboard. It converts 120vac (standard house power) into DC voltages that are used by other components in the PC.

5. It is a magnetic storage device that is installed inside the computer, used as permanent storage for data.