MONITOR

computer display that is like a TV monitor

computer monitor image is made up of pixels (dots)

Standard

television set

An ordinary home

television that

can be used for

computer output

Standard

computer

monitor

Better resolution

than TV monitors

Liquid Crystal

Display (LCD)

These screens are made up of two glass plates with liquid in between

KEYBOARD

The keyboard is the main input device for text and commands. The computer keyboard uses the same key

arrangement as typewriters. It also contain standard function keys, such as the escape, cursor movement and control keys.

MULTIMEDIA KEYBOARD WIRELESS KEYBOARD

Keyboards come with three (3) different types of

port such as:

SERIAL PORT

PS/2 PORT

USB PORT

SPEAKER

SYSTEM UNIT

also known as a base unit

the main body of a desktop computer

Speakers give out information in the form of sound. Computer speakers range widely in quality and price. Computer speakers are typically packaged with computer systems in small plastic boxes with

mediocre sound quality.

MOUSE

an input device used to controls the movement of the cursor or pointer on a display screen It has right click, left click and double click to

function

PRINTER

device that produces a hard copy (permanent human readable text or graphics) of documents stored in electronic form that prints texts or illustrations on paper

low-cost printer that produces low quality output

works like an automatic typewriter

can also be used when carbon copies of a document are required

low-cost printer that produces a mid-quality output

most economical for colour output

uses a laser beam to produce the best quality output

speed of a laser printer is typically about 8 ppm (page per minute).

Dot-Matrix printer Ink-Jet printer Laser printer

EXERCISE

1. Look at the pictures given in Column A. Then, name the components of the computer and state their functions

COLUMN A COLUMN B (name and function)