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247542 633900398710328750

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247542 633900398710328750

  1. 1. Introduction To Operating System B y:Simran
  2. 2. Operating System <ul><li>An Operating System is a software that manages the computer`s hardware and provide a convenient and safe environment for running programs. </li></ul><ul><li>It acts as the interface between user and hardware resources. </li></ul>COMPUTER HARDWARE OPERATING SYSTEM USER
  3. 3. COMPUTER HARDWARE OPERATING SYSTEM USER FIG.1. USER COMMUNICATES WITH HARDWARE USING OPERATING SYSTEM
  4. 4. Need Of Operating System <ul><li>Operating System provides a stable and consistent way to deal with hardware without having to know all the details of the hardware. </li></ul><ul><li>To manage the hardware and software resources. </li></ul><ul><li>It plays the role of good parent, making sure that each application gets the necessary resources while playing nicely with other applications. </li></ul>
  5. 5. Features Of Operating System <ul><li>Program execution . </li></ul><ul><li>Interrupts </li></ul><ul><li>Protected mode and supervisor mode. </li></ul><ul><li>Memory management </li></ul><ul><li>Virtual Memory </li></ul><ul><li>Multitasking </li></ul><ul><li>Disk access and file systems </li></ul><ul><li>Device drivers </li></ul><ul><li>Networking </li></ul><ul><li>Security </li></ul>
  6. 6. Functions Of Operating System <ul><li>Transfer input from keyboard to the memory </li></ul><ul><li>Display messages be it input or output on screen. </li></ul><ul><li>Output data to to the printer from the memory. </li></ul><ul><li>Control the printer and peripherals. </li></ul><ul><li>Load programs and packages from storage devices. </li></ul>
  7. 7. <ul><li>Copy data or programs from one device to another. </li></ul><ul><li>Protect working storage from overwriting. </li></ul><ul><li>Execute user programs and commands. </li></ul><ul><li>Security and protection to user data. </li></ul><ul><li>The operating system allocates memory for program and loads the program to the allocated memory. </li></ul><ul><li>After program has completed execution, the operating system cleans up the memory and makes them available for next program. </li></ul>
  8. 8. Functions Of Multi-User Operating System <ul><li>Processor management and Scheduling </li></ul><ul><li>Device Management </li></ul><ul><li>File and data management </li></ul><ul><li>Memory management </li></ul><ul><li>Handling users </li></ul><ul><li>Communication </li></ul><ul><li>Security </li></ul><ul><li>Fault Tolerance management </li></ul><ul><li>User command execution </li></ul><ul><li>Job accounting </li></ul>
  9. 9. Types Of Operating System <ul><li>Multi-tasking Operating System </li></ul><ul><li>Distributed Data </li></ul><ul><li>Multi-user Operating System </li></ul><ul><li>Time Sharing Operating System </li></ul><ul><li>Real Time Operating System </li></ul><ul><li>Multiprocessor Operating System </li></ul><ul><li>Multiprogramming Operating System. </li></ul>
  10. 10. Examples Of O.S. <ul><li>Windows Vista </li></ul><ul><li>Windows XP Professional edition </li></ul><ul><li>Windows XP Home edition </li></ul><ul><li>Windows 2000 </li></ul><ul><li>Windows ME </li></ul><ul><li>Windows 98 </li></ul><ul><li>Windows NT </li></ul><ul><li>Windows 95 </li></ul><ul><li>UNIX </li></ul><ul><li>Linux </li></ul><ul><li>Apple Macintosh </li></ul>
  11. 11. Example of a chart
  12. 12. Picture slide <ul><li>Bullet 1 </li></ul><ul><li>Bullet 2 </li></ul>
  13. 13. Examples of default styles <ul><li>Text and lines are like this </li></ul><ul><li>Hyperlinks like this </li></ul><ul><li>Visited hyperlinks like this </li></ul>Text box Text box With shadow Table

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