Operating Systems - ppt

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A basic description of operating systems... focusing more on windows.

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SYSTEMS Operating Systems - Toms Augustine

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Generations of Computer 1 st Generation 2 nd Generation 3 rd Generation 4 th Generation 5 th Generation Operating System is used.. (No Operating System)

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History of computers First generation 1945 - 1955 vacuum tubes, plug boards Still very slow and used for scientific calculations No OS was needed Programs were entered by setting some switches 1 st Generation Computers First generation 1945 - 1955 vacuum tubes, plug boards Still very slow and used for scientific calculations No OS was needed Programs were entered by setting some switches

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History of computers Second generation 1955 – 1965 transistors, batch systems Universities started to buy computers (spending millions of dollars) Punched cards were used To run a job (a program or a set of related programs) first punch it and give the deck to the operators and wait for the output (batch operation) Computers were single user IBM STRETCH DEC PDP-1 2 nd Generation Computers Second generation 1955 – 1965 transistors, batch systems(single stream batch processing systems as data were submitted in groups or batches. General Motors Research Laboratories implemented the first operating systems in early 1950's for their IBM 701 Punched cards were used To run a job (a program or a set of related programs) first punch it and give the deck to the operators and wait for the output (batch operation) Computers were single user

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What is an operating System? A program that acts as an intermediary between a user of a computer and the computer hardware. Operating system goals: Execute user programs and make solving user problems easier. Make the computer system convenient to use. Use the computer hardware in an efficient manner. Allows efficient usage; parallel activity, avoids wasted cycles. Provides information protection. Gives each user a slice of the resources. Acts as a control program.

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Features of operating system 1. Program execution . Interrupts Protected mode and supervisor mode. Memory management Virtual Memory Multitasking Disk access and file systems Device drivers Networking Security

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Need of operating system Operating System provides a stable and consistent way to deal with hardware without having to know all the details of the hardware. 2. To manage the hardware and software resources. 3. It plays the role of good parent, making sure that each application gets the necessary resources while playing nicely with other applications.

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Various operating systems developed by various companies Operating system Platform Developer AIX/AIXL Various IBM AmigaOS Amiga Commodore BSD Various BSD Caldera Linux Various SCO Corel Linux Various Corel Debian Linux Various GNU DUnix Various Digital DYNIX/ ptx Various IBM HP-UX Various Hewlett Packard IRIX Various SGI Kondara Linux Various Kondara

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Previous versions of windows Release date Product name Notes Last IE May 1990 Windows 3.x Unsupported 5 July 1993 Windows NT Unsupported 5 August 1995 Windows 95 Unsupported 5.5 June 1998 Windows 98 Unsupported 6 February 2000 Windows 2000 No longer supported 6 September 2000 Windows Me Extended Support until July 13, 2010 [2] 6 October 2001 Windows XP Current for SP 2 and SP 3 ( RTM and SP 1 unsupported). 8 November 2006 (volume licensing) January 2007 (retail) Windows Vista Current. Version Changed to NT 6.0.6001 with SP1 (February 4 08) 8 July 2007 Windows Home Server Current 8 February 2008 Windows Server 2008 Current 8 October 22, 2009 Windows 7 Current 8

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Various operating systems developed by various companies Operating system Platform Developer Linux Various Linus Torvalds MAC OS 8 Apple Macintosh Apple MAC OS 9 Apple Macintosh Apple MAC OS 10 Apple Macintosh Apple MAC OS X Apple Macintosh Apple Mandrake Linux Various Mandrake MINIX Various MINIX MS-DOS 1.x IBM / PC Microsoft MS-DOS 2.x IBM / PC Microsoft MS-DOS 3.x IBM / PC Microsoft MS-DOS 4.x IBM / PC Microsoft

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Various operating systems developed by various companies Operating system Platform Developer MS-DOS 5.x IBM / PC Microsoft MS-DOS 6.x IBM / PC Microsoft NEXTSTEP Various Apple OSF/1 Various OSF QNX Various QNX Red Hat Linux Various Red Hat SCO Various SCO Slackware Linux Various Slackware

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Windows xp Windows has had a makeover for XP Updated graphics Clearer Text especially on Flat panel LCD screens (like those on your new systems) Task-oriented interface: Copy, move or delete files and folders conveniently A preview…

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Windows XP Desktop

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Managing Files in Windows XP

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Improved user interface Improved user interface - New ways to look at your files and folders 1) More convenient ways of viewing graphics, multimedia 2) Easier to organize your display - My Documents and My Computer now Task-oriented 1) A left pane presents tasks varying according to what you select on the right 2) Easier file and folder management

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For the user, Windows XP is not a radical break with Windows’ past You can still do almost everything as you used to New possibilities save time Many improvements “under the hood” More stable programming core Based on Windows NT/ Windows 2000 architecture Familiar features

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What is Windows 7 ? What is Windows 7? Most Recent version of Microsoft Windows Operating system. Windows 7 was released to Manufacturing on July 22,2009,and reached general retail availability on October 22,2009. Windows 7 overview

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Windows 7 Desktop

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Managing Files in Windows 7

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Benefits of windows 7 Performance : Windows 7 starts, shuts down, and resumes from Standby faster than earlier versions of Windows . Reliability : Reliability improvements in Windows 7 include a Fault Tolerant Heap that resolves common memory management issues. Application Compatibility : A key engineering goal for Microsoft is that software that runs on Windows Vista will run as well or better on Windows 7.

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Device Compatibility : As with software, Microsoft set an engineering goal that devices that work with Windows Vista will also work with Windows 7—and has greatly expanded the list of devices and peripherals that are being tested for compatibility Security : Windows 7 delivers new capabilities to better protect your security and privacy, and makes existing security features such as User Account Control and Windows Defender easier to use. Improved Battery Life : Improvements to power management in Windows 7 will help extend the battery life of your mobile PC.

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Windows 7 requirements Architecture 32-bit 64-bit Processor 1 GHz 32-bit processor 1 GHz 64-bit processor Memory ( RAM) 1 GB of RAM 2 GB of RAM Graphics Card DirectX 9 graphics processor with WDDM driver model 1.0 (For Aero) HDD free space 16 GB of available disk space 20 GB of available disk space Optical drive DVD drive (only to install from DVD/CD Media)

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Features of windows 7 More personal: Redecorate your desktop with fun new themes, slide shows, or handy gadgets. Performance improvements : Designed to sleep and resume quicker, be less memory hungry, and spot USB devices faster. Play To : Play your media on other PCs, stereos, or TVs around the house. Remote Media Streaming : Enjoy music and video on your home PC—even when you\'re not at home. Windows Touch : Pair Windows 7 with a touch screen and you won't always need a keyboard or mouse.

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