Operating System

Operating System

1. An operating system is a system program that controls and organises the general operation of the computer.

2. controls the backing store and peripherals such as scanners and printers

   • deals with the transfer of programs in and out of memory
     • organises the use of memory between programs

3. common operating systems

   • Windows
   • Apple
     • Linux

4. Functions of the operating system

   • controls the backing store and peripherals such as scanners and printers deals with the transfer of programs in and out of memory organises the use of memory between programs organises processing time between programs and users maintains security and access rights of users deals with errors and user instructions allows the user to save files to a backing store provides the interface between the user and the computer - for example, Windows Vista and Apple OSX. For more information, see the User Interfaces Revision Bite. issues simple error messages

5. What is a GUI?

   • In computing, a graphical user interface is a type of interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, as opposed to text-based interfaces, typed command labels or text navigation

6. What is a CLI?

   • The Command Line Interface was the primary means of interaction with most computer systems until the introduction of the video display terminal in the mid-1960s, and continued to be used throughout the 1970s and 1980s on Unix systems and personal computer systems including MS-DOS, CP/M and Apple DOS.