Topologi

1. 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

2. 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

3. Keyboards come with three (3) different types of
port such as:
SERIAL PORT
PS/2 PORT
USB PORT

4. 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.

5. 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

6. 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

7. 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)