BASIC COMPUTER CONCEPT - JS1 NOTES

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 BASIC COMPUTER CONCEPT

Meaning, Parts, Categories, Input and Output Devices



Meaning of Computer

A computer is a programmable machine designed to perform arithmetic and logical operations automatically on the input given by the user and gives the desired output.

Description of a Computer As Input-Process-Output (IPO) System

IPO means input data into the system, doing something with the data and then displaying the results.

Parts of a Computer System


The common parts of the computer system are:

1.The System Unit 

2. The Monitor (VDU)

3. The Keyboard 

4. The Mouse 

5. The  Printer

6. The Speaker



Input Devices

These are  devices used for sending data or information into the computer for processing. Examples are keyboard, mouse, joystick, light pen, scanner, camera e.t.c 

Output Devices

Output devices are devices used for receiving information or data that is processed by and sent out from a computer. Examples are:

  1. The Monitor

  2. The Speaker

  3. The Projector

  4. Headphones

  5. Optical Mark Readers

  6. Braille Readers

Processing Unit

Processing unit allows data to be processed in the computer through the central processing unit (C.P.U)/processor and the memory unit.

Class Activities

1. What is a computer?

2. List any four (4) parts of a computer

3. CPU stands for ________________

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