Computer Devices and Peripherals
Computer devices are either peripherals attached to the main system or part of
the main system of the computer. In other words, hardware devices can be
classified into three categories: input, output and system.
Input Devices enter data into the computer. Such devices include:
1.
2.
3.
4.
5.
keyboard
mouse
scanner
video camera
microphone,
etc…
Storage/Processing Devices: The system unit enables the computer to process
information, based on the program instruction and data entered, store data, and
communicate with other parts of the computer. The major components of a system unit
are:
1. central processing unit
(CPU)
2. motherboard
3. hard disk drive
4. floppy disk drive
5. CD-ROM
6. data bus for data transfer
7. modem card
8. video card
9. expansion cards (circuit
boards that connect extra
peripherals to the mother
board) etc…
Output Devices are peripherals attached to the system that deliver processed data in
a format that the user can understand. Such devices include:
1. monitors
2. printers
3. speakers
The Keyboard
This is the most common type of input device.
Research local stores and newspaper ads. List a specific model, the price, the
features it has and where it can be purchased. Explain why this is a good purchase in
your view.
The Mouse
A mouse is a pointing device you can use instead of the keyboard keys. It is used to
move the insertion point and choose selections on the computer screen.
Research local stores and newspaper ads. List a specific model, the price, the
features it has and where it can be purchased. Explain why this is a good purchase in
your view.
Printers
When choosing a printer one must consider




Resolution (measured in pixels)
Speed (measured in pages per minute)
Quality
Cost
List a specific model, the price, the four features listed
above and where it can be purchased. Explain why this is a good purchase in your
view.
Monitors
The monitor can vary in size or colour and pixels. List a specific
model, the price, the features it has and where it can be
purchased. Explain why this is a good purchase in your view.