Operating
System
The operating system
is collection of programs that control all hardware and other resources in the
computer system. With out operating system a computer is useless .It is the
operating system that operates and controls the CPU ,memory, various input and
output devices such as keyboard ,the mouse the monitor ,the printer ,etc .It is
responsible for smooth and efficient operation of the computer .
Functions
of operating system
Now a days operating
system are very complex .the operating system control all hardware and other
resources in the computer and also does the following jobs ;
1.
File
management:- The operating system create and manages the
directory system on the secondary storage devices .It also has commands to copy
,rename ,move and delete files and directories on the secondary storage devices
.
2.
It contains a text editor that can be
used to create simple text files .
3.
If the computer system is capable of
running multiple programs simultaneously .The operating system switches the
computers resources from one program to another
4.
It maintains an internal real time
clock known as system clock .This clock is used to display the current dare and
time .This clock is used to mark the date and time of creation or modification
of files
5.
It acts as an interface between the
user and the computer .It accepts commands
and instructions from the user and executes them. The computer develop a
an error ,the operating system displays suitable error message.
6.
it includes several tools and utility
programs to help the user .
Popular
operating systems for personal Computer
1)
Disk operating System (DOS)
2)
Windows 3.1
3)
Windows 95
4)
Windows 200
5)
Windows XP
6)
Widows vista
7)
Linux
8)
Unix