when you have a conversation
with a friend,your ear acts as the input device. It receives the information
your friend gives you and passes on yhe information to your brain. Your
brainacts as the processing device. It understands the information and frames
an appropriate response. The mouth acts as the output device and gives a reply
to your friend.
Similarly, in a
computer,device, such as the keyboard and the mouse are input devices. The
box-like structure called the system unit is responsible for all the processing
required to convert the input to the
required output. Devices ,such as the monitor and the printer are output devices.
These input and output devices attached to your computer need to conncet to a
component within your system unit to allow data to flow. For exemple, the
monitor is connected to a video card and the speakers to a sound card. The
video card and the the sound card, in turn, reside on the motherboard tofether
with the processor, memory and optional internal I/O devices, such as a network
interface card.
Motherboard
The system unit contains a
large board that has anumber of tiny electronic circuits and other components.
It is known as the motherboard. The motherboard is a very important part of the
system unit and houses several vital compenents of the computer.
The microprocessor is the
the most important component of the motherboard. Data is recived from the input
devices. The actual processing of data, that is the arithmetic or logical
operations on the giver data,occurs in the microprocessor. Finally, the
processed information is the output devices depicts the working of a computer.
Video Card
A video card plugs into a
personal computer to give it display capabilities. In other words, it enables
your computer to represent data in a visual form. Video cards are also called
video adapters, video boards, video display boards, graphics cards and graphics
adapters. Each adapter provides digital-to-analog conversion, video RAM and a
vider controller so that can be sent to a computer’s display.
Sound card
A sound card is a device
in the system unit that enables a computer to accept, process and play sound, A
sound card enabl4es the computer to record sound through a microphone.
Manipulate sound stored on a disk and output the sound through speakers.
