Primary 3 ICT SECOND TERM WEEK 1 What is a Computer

What is a Computer?

A computer is an electronic device that accepts data as input, processes it and brings out information as output.

Basic parts of a computer

Monitor, Keyboard, Mouse, CPU (System Unit), UPS (Uninterrupted Power Supply), USB drive, Speakers, Projector, Printer and scanner.

Classes of Computers [mediator_tech]

Super Computers	Mainframe Computer	Mini Computer	Micro Computer

Touch Typing

THE HOMEKEYS: A S D F SPACE BAR, SPACE BAR J K L ;

Types of CPU (Central Processing Unit)

Vertical CPU (Tower Computer)

This type of CPU is in a standing position

Horizontal CPU (Desktop Computer)

This type of CPU is usually in a lying down position. Usually placed on the table and the monitor placed on top

Main Units of the CPU (Central Processing Unit)

• Control Unit: It controls other units within the CPU. It is the brain within the CPU.

• Arithmetic Logic Unit: It is the part of the CPU that performs arithmetic (mathematical) and comparison operations.

• Memory Unit: It is used to store data.