dp - operating system
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OPERATING SYSTEM (OS)
Data Processing
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What is an Operating System? Software that controls the overall operation of
the computer.
Consisting of programs and data, that runs on
computers, manages computer hardware
resources, and provides common services for
execution of various application software.
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Software
Utility Operating System
System
Software
Application
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Software Application software: Programs for performing a specific
task
Eg: Word processing, spreadsheets, gaming
System software:
1. Operating System
2.Utility software : Software that extends orcustomizes the capabilities of the operating system
Eg : Formatting
Compress/decompress data
Network communications
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Operating System Software
Operating systems are found on almost any device thatcontains a computerfrom cellular phones and video
game consoles to supercomputers and web servers.
Examples :
Microsoft Windows
Linux
Mac OS
Android
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Operating System Software
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Users View
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Systems View
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The functions of an operating system Manages and Interacts with Computer Hardware
Provides and Manages System Security
Provides the System Interface
Provides the Interface for Application Software
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Types of Operating System Real-Time OSAims at executing real-time applications.
# Eg: Transaction Processing Facility developed byAmerican Airlines and IBM
# Windows CE is a real-time operating system
Multi-user vs. Single-user
A multi-useroperating system allows multiple
users to access a computer system concurrently.Eg : Windows Server 2008, NT, 2000
Redhat Linux ,Sun Unix.
A single-useroperating systems, used by a single
user at a time.
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Distributed OS
A distributed operating system manages a group of
independent computers and makes them appear to
be a single computer.
When computers in a group work in cooperation,
they make a distributed system.
Types of Operating System
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Data Processing
http://en.wikipedia.org/wiki/File:Windows_logo.svg -
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Windows A series of operating systems produced by
Microsoft.
As an add-on to MS-DOS in response to the
growing interest in graphical user interfaces
(GUIs).
Windows had approximately 90% of the market
share of the client operating systems.
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It was originally going to be called "Interface
Manager" but Rowland Hanson, the head of
marketing at Microsoft, convinced the
company that the name Windows would be
more appealing to consumers.
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The first version of Microsoft Windows included
a simple graphics painting program called Windows Paint;
Windows Write, a simple word processor; (Now
WordPad)
an appointment "calendar";
a "notepad";
a "clock";
a "control panel";
a "computer terminal.
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Windows An OverviewInitial Release November 20,1985
Programming Language C,C++,Assembly Language
OS Family Windows 9x
Windows CEWindows NT
Recent Client Version Windows 7
Recent Server Version Windows 2008 R2
Recent Mobile Version Windows Phone 7
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Windows - TimelineNovember 1985 Windows 1.01
November 1987 Windows 2.03
May 1988 Windows 2.10
March 1989 Windows 2.11
May 1990 Windows 3
March 1992 Windows 3.1x
October 1992 Windows for workgroups 3.1
July 1993 Windows NT 3.1
January 1994 Windows 3.2
September 1994 Windows NT 3.5
May 1995 Windows NT 3.51
August 1995 Windows 95
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Windows - TimelineJuly 1996 Windows NT 4.0
June 1998 Windows 98
May 1999 Windows 98 SE
February 2000 Windows 2000
September 2000 Windows ME
October 2001 Windows XP
March 2003 Windows XP 64 bit Edition
April 2003 Windows Server 2003
April 2005 Windows XP Professional x64
January 2007 Windows VistaJuly 2007 Windows Home Server
February 2008 Windows Server 2008
October 2009 Windows 7 & Windows Server 2008 R2
April 2011 Windows Home Server 2011
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Usage share of Windows operating systems as onAugust 2011All Version 92.89%
Windows 7 30.6%
Windows XP 52.46%
Windows Vista 9.4%
Windows 2000 0.18%
Windows NT 4.0 0.18%
Windows 98 0.05%
Windows ME 0.01%
Windows 95 0.01%