Operating System :-
An operating system or ‘OS’, is software that communicates with the hardware and allow other programs to run.
Operating system interface :-
1. Hard Drive
2. Mouse
3. Keyboard
4. Sound card
5. Speaker
6. Video card
7. Monitor
Function of an operating system :-
1. Input / Output control
2. Resource Allocation
3. File management
4. Processor Management
5. Error Reporting
6. Memory Management
Classification of operating system :-
1. Single processor operating system -
Single user operating system allow only
one user to make use of a PC at any given
time.
2. Batch processor operating system -
The OS defines a job which has
predefined sequence of commands,
programa and data as a single time.
3. Multi programming operating system -
Multitasking has the same meaning of
multi programming but in a more general
sense, as it refers to having multiple
(programs, processes, tasks, threds)
running at the same time.
4. Time sharing operating system - Time
sharing is a technique whuch enables
many people, located at various
terminals, to use a particular computer
system at the same time.
5. Real time operating system - A real
time operating system (RTOS) is any
operating system intended to serve real
time applicationa that process data as it
comes in, typically without buffer delays.
Some popular operating system :-
1. Microsoft Windows - Microsoft Windows
was announced by “Bill Gates” on
‘November 10,1983’ Microsoft introduced
windows as a graphical user interface for
MS-DOS(Microsoft Disk Operating
System)
2. Windows NT 3.1 - In 1993, Microsoft
released Windows NT 3.1 the first version
of the newly developed Windows NT
operating system.
3. Windows NT 4.0 - In 1996, Windows NT
4.0 was released which includes a fully
32 bit version of windows explorer
written specifically for it, making the
operating system work just like Windows
95.
4. Windows 95 - Manufacturing on August
15,1995 and generally to retail on August
24,1995.
5. Windows 98 - Manufacturing on May
15,1998 and to retail on June 25,1998.
6. Windows 2000 - Manufacturing on
December 15,1999 and launched to retail
February 17,2000.
7. Windows XP - It was manufacturing on
August 24,2001 and broadly realesed for
retail sale on October 25,2001.
8. Windows Vista - Released to
manufacturing November 8,2006.
9. Windows 7 - Windows 7 was released for
retail availability world wide in 2009.
10. Windows 8 - On August 1,2012 and retail
October 25,2012.
11. Windows 8.1 - October 17,2013
12. Windows 10 - The final version of
windows 10 was released to public on
July 29,2015.
13. LINUX - Linux is a family of free and
open source software operating system
based on the Linux Kernel, realesed on
September 17,1991 by Linux Tervalds.
14. UNIX - The unix operating system is a
set of programs that act as a link
between the computer and the user.
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