COMPUTERSYSTEM

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COMPUTER SYSTEM
Each computer consists of a series of devices that together
operate as an integrated unit or
computer system. The processor is made up of the memory,
arithmetic, logic and control
units. A large computer system will normally have one or
more auxiliary units, where
input and output data are stored.

How Computers Work?
PROGRA RESUL
M AND
DATA TS




INPUT UNIT STORAGE UNIT OUTPUT UNIT




CENTRAL
CONTROL UNIT PROCESSI
NG UNIT




ARITHMETIC LOGIC
UNIT

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Input: This is the process of entering data and programs in to the
computer system. Since
computer is an electronic machine like any other machine which
takes as inputs raw data
and performs some processing giving out processed data, the input
unit takes data from
user to the computer in an organized manner for processing.
Information and programs
are entered into the computer through input devices such as the
keyboard, disks, or
through other computers via network connections or modems
connected to the internet.
Storage: The process of saving data and instructions permanently is
known as storage.
Data has to be fed into the system before the actual processing
starts. It is because the
processing speed of Central Processing Unit (CPU) is so fast that the
data has to be
provided to CPU with the same speed. Therefore the data is first
stored in the storage unit
for faster access and processing. This storage unit or the primary
storage of the computer
system is designed to do the above functionality. It provides space
for storing data and
instructions. The storage unit performs the following major
functions: