Operating systems

Operating systems

1. An operating system is software that manages computer hardware and software resources and provides common services for computer programs.

2. The Operating system controls the hardware and software

3. Operating systems usually come preloaded on any computer you buy. Most people use the operating system that comes with their computer, but it is possible to upgrade or even change operating systems. The three most common operating systems for personal computers are Microsoft Windows, Mac OS X, and Linux.

4. The basic functions of an operating system are: Booting the computer. Performs basic computer tasks Provides a user interface,

   • Provides a user interface, e.g. command line, graphical user interface (GUI)
   • eg managing the various peripheral devices eg mouse, keyboard
   • GUI
     • Advantages (only when it is properly built) - it can be user-friendly and speed up the user's work. - it can be more attractive for non-technical people. - in general, it looks more professional (but this does not mean it is always the best solution).
     • Disadvantages - when it is not properly built, it can be very difficult to work with. - it generally requires more memory resources than a non-graphical one. - it might require the installation of additional software, e.g., the "runtime environment" in the case of java. - depending on the programmer, it might require more time to be implemented.
   • CLI