Operating System



An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs.  The operating system is a vital component of the system software in a computer system.  Application programs usually require an operating system to function.

Examples of popular modern operating systems include Android, BSD, iOS, GNU/Linux, OS X, QNX, Microsoft Windows, Windows Phone, and IBM z/OS.  All these, except Windows and z/OS, share roots in UNIX.





  1. Real-time
  2. Multi-user
  3. Multi-tasking vs. single-tasking
  4. Distributed
  5. Embedded
  6. readmore_03_tparent30_twinkles



  • Microsoft Windows – PC and IBM compatible operating system.
  • Apple MacOS – Apple computer operating system. The only Apple computer operating system.
  • Ubuntu Linux – A popular variant of Linux used with PC and IBM compatible computers.
  • Google Android – operating system used with Android compatible phones.
  • iOS – Operating system used with the Apple iPhone.



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