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Operating System

Operating System

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Operating System

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  1. Operating Systems SYSTEMS

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

  3. History of computers 1st 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 • 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

  4. 2nd Generation Computers 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 • 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 IBM STRETCH DEC PDP-1

  5. 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.

  6. 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

  7. 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.

  8. Various operating systems developed by various companies

  9. Previous versions of windows

  10. Various operating systems developed by various companies

  11. Various operating systems developed by various companies

  12. 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

  13. 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

  14. 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

  15. What is Windows 7?Windows 7 was released to Manufacturing on July 22,2009,and reached general retail availability on October 22,2009. Windows 7 overview What is Windows 7 ?

  16. Managing Files in Windows 7

  17. 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.

  18. 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.

  19. Windows 7 requirements

  20. 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.

  21. WINDOWS 8

  22. START SCREEN

  23. Customize the image you see on Windows 8 Lock screen as well as details of unread mails or missed instant messages. http://www.everythingabouttablets.net/wp-content/uploads/2011/05/lock.2.png

  24. THANK YOU