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lecture:Operating Syste Ms


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created by yeswanth.presentation on history of operating systems, Windows-7 and some more advantages of operating systems..........

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lecture:Operating Syste Ms

  2. 2. Operating system <ul><li>Program used to control computer, link between user and internal working of computer and programs </li></ul>
  3. 3. Why We Need Operating Systems <ul><li>An OPERATING SYSTEM is a PROGRAM which acts as an interface between the user and the hardware to: </li></ul><ul><li>1. Facilitate convenient access to hardware by the user </li></ul><ul><li>2. Improve efficiency of the system </li></ul><ul><li>3. Provide security of the system and its program and data </li></ul><ul><li>4. Emulate features not available in hardware </li></ul>
  4. 4. User Views of Operating System <ul><li>1. System Calls (For Programmers) </li></ul><ul><li>2. System Programs (For Users) </li></ul><ul><li>3. Commands (For Superusers) </li></ul><ul><li>4. File System (For All) </li></ul>
  5. 5. Modern Operating Systems Windows (Microsoft Corporation) these include a family of systems: 98, Me, CE, 2000 , XP, Vista , and others Linux ( (Linus Torvalds, OSF GNU) OSF-1 (DEC, OSF) Solaris (Sun Microsystems) ( IRIX (Silicon Graphics) OS2 (IBM) OS/390 (IBM) VMS (Dec/Compaq/HP) MacOS (Apple)
  6. 6. The History of WINDOWS <ul><li>Timeline of Microsoft Windows </li></ul><ul><li>1983 Microsoft Windows was first announced in November, 1983. </li></ul><ul><li>Timeline of Microsoft Windows </li></ul><ul><li>1983 Microsoft Windows was first announced in November, 1983. </li></ul><ul><li>1985 Microsoft Windows version 1.0 was released in November, 1985. </li></ul><ul><li>1987 Microsoft Windows version 2.0 was released in April, 1987. </li></ul><ul><li>1990 Microsoft Windows version 3.0 was released in May, 1990. </li></ul><ul><li>1992 Microsoft Windows version 3.1 was released in April, 1992. </li></ul><ul><li>1995 Microsoft Windows 95 was released in August, 1995. </li></ul><ul><li>1998 Microsoft Windows 98 was released in June, 1998. </li></ul><ul><li>1999 Microsoft Windows 98 SE (Second Edition) was released in May, 1999. </li></ul><ul><li>2000 Microsoft Windows ME (Millennium) was released in July, 2000. </li></ul><ul><li>2001 Microsoft Windows XP was announced on February 5, 2001. </li></ul>
  7. 7. Windows <ul><li>Windows 95, 98, 2000, ME, NT, XP? </li></ul><ul><li>Desktop and icons </li></ul><ul><li>Task bar </li></ul><ul><li>Start button </li></ul><ul><li>Programs </li></ul>
  8. 8. Windows XP™ <ul><li>Biggest, </li></ul><ul><li>…most comprehensive, </li></ul><ul><li>…most widely distributed </li></ul><ul><li>…general purpose operating system in history of computing </li></ul><ul><li>Affects almost all other systems, one way or another </li></ul>
  9. 9. Windows XP <ul><li>32-bit preemptive multitasking operating system for Intel microprocessors </li></ul><ul><li>Key goals for the system: </li></ul><ul><ul><li>portability </li></ul></ul><ul><ul><li>security </li></ul></ul><ul><ul><li>POSIX compliance </li></ul></ul><ul><ul><li>multiprocessor support </li></ul></ul><ul><ul><li>extensibility </li></ul></ul><ul><ul><li>international support </li></ul></ul><ul><ul><li>compatibility with MS-DOS and MS-Windows applications. </li></ul></ul><ul><li>Uses a micro-kernel architecture </li></ul><ul><li>Available in at least four versions: Professional , Server , Advanced Server , National Server </li></ul>
  10. 10. Design Principles (Cont.) <ul><li>Reliability </li></ul><ul><ul><ul><li>XP uses hardware protection for virtual memory, software protection mechanisms for OS resources </li></ul></ul></ul><ul><li>Compatibility </li></ul><ul><ul><ul><li>Applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on XP without changing the source code </li></ul></ul></ul>
  11. 11. Design Principles (Cont.) <ul><li>Performance </li></ul><ul><ul><ul><li>XP subsystems can communicate with one another via high-performance message passing </li></ul></ul></ul><ul><ul><ul><li>Preemption of low priority threads enables the system to respond quickly to external events </li></ul></ul></ul><ul><ul><ul><li>Designed for symmetrical multiprocessing </li></ul></ul></ul><ul><li>International support </li></ul><ul><ul><ul><li>Supports different locales via the national language support (NLS) API </li></ul></ul></ul>
  12. 12. So.. What’s the big deal? <ul><li>Windows 7 can be seen as a incremental update to Windows Vista. It has a simpler user interface and enhancements to performance, but uses the same technologies already in place with Vista. </li></ul><ul><li>Windows 7 is made to be compatible with Vista programs, and works with most Vista drivers. </li></ul>
  13. 13. New Feature: Jump Lists <ul><li>One of the most useful improvements in Windows 7 is the addition of Jump Lists: contextual menus that pop-up when hovering over an icon in the Start menu. Jump Lists also appear when right-clicking on an icon in the taskbar. </li></ul>
  14. 14. Jump Lists <ul><li>The main role of Jump Lists is to provide access to recent documents in as few button clicks as possible. For example, opening a recently visited site (or favorite) in Internet Explorer 8 is as simple as right-clicking the IE icon on the taskbar and then left-clicking the site. </li></ul><ul><li>In Microsoft Office, Jump Lists can be used to quickly open recent documents. </li></ul>
  15. 15. Jump Lists Contd… <ul><li>Any program—or file within a Jump List—can also be “pinned” to the taskbar, similar to Quick Launch icons in Windows XP. </li></ul>
  16. 16. New Feature: Program Thumbnails <ul><li>If a program is open, then hovering over that program’s icon in the taskbar will bring up a thumbnail view of any open windows. </li></ul>
  17. 17. New Feature: HomeGroups <ul><li>Windows 7 takes a new approach to home networking with the advent of HomeGroups. Sharing files with other Windows 7 PC’s is easy, and is secured with 128bit encryption and a randomly generated password. </li></ul>
  18. 18. New Feature: Action Center <ul><li>The Security Center in Windows Vista and Windows XP is gone, replaced with Windows 7’s brand new Action Center. </li></ul><ul><li>The Action Center not only provides security information, but also problem reports and recovery options—all within a single dialog. </li></ul>
  19. 19. New Feature: Problem Steps Recorder <ul><li>The Problem Steps Recorder, accessible by typing psr.exe into the Search bar, documents the actions needed to reproduce an error. Once complete, the report can then be given to a system administrator—or used for self analysis—to easily troubleshoot your PC. </li></ul>
  20. 20. New Feature: XP Mode <ul><li>Windows 7 Ultimate has a freely downloadable add-on that lets users run an instance of Windows XP within a window on their Windows 7 desktop. To use this feature, the PC’s processor must support virtualization. </li></ul>
  21. 21. Missing Features <ul><li>Windows 7 no longer comes with: </li></ul><ul><ul><li>Windows Movie Maker </li></ul></ul><ul><ul><li>Windows Messenger </li></ul></ul><ul><ul><li>Windows Mail </li></ul></ul><ul><li>But new versions of these programs can be downloaded now as part of the Windows Live Essentials pack. </li></ul><ul><ul><li>Download the pack at </li></ul></ul>
  22. 22. Editions and Availability <ul><li>Windows 7 was released on October 20 th , 2009. Although 6 different versions are developed, only 2 is initially available at retail: </li></ul><ul><ul><li>Windows 7 Home Premium </li></ul></ul><ul><ul><li>Windows 7 Professional </li></ul></ul><ul><li>Windows 7 Ultimate will be accessible via the Windows Anytime Upgrade program. </li></ul>