Types of Operating System

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   Types of Operating System

  •  Single User OS-> Operating systems for Personal Computers (PC) are single-user OS. Single user OS are simple operating system designed to manage one task at a time. MS-DOS is an example of single user OS.
  •   Multiuser OS-> It is used in mini computers or mainframes that allow same data and applications to be accessed by multiple users at the same time.

  •  Multiprocessing OS-> It has two or more processors for a single running process. Processing takes place in parallel and is also called parallel processing. Each processor works on different parts of the same task. Since execution takes place in parallel, they are used for high speed execution, and to increase the power of computer. Linux, UNIX and Windows 7 are examples of multiprocessing OS.
  •   Time Sharing OS-> It allows execution of more than one tasks or processes concurrently. For this, the processor time is divided among different tasks. This division of time is also called time sharing. The processor switches rapidly between various processes. For example, the user can listen to music on the computer while writing an article using a word processing software. The user can switch between the applications and also transfer data between them. Windows 95 and all later versions of Windows are examples of multitasking OS.
  •  Real Time OS-> It is a multitasking operating system that aims at executing real-time applications. In this type of operating system, the tasks have to be done within a fixed deadline. Examples are: control of nuclear power plants, oil refining, chemical processing and traffic control systems.
  • Interactive Operating System-> This is the operating system that provides a Graphic User Interface (GUI) through which the user can easily navigate and interact. The computer responds almost immediately after an instruction has been entered, and the user can enter new instructions after seeing the results of the previous instructions.
  • Distributed OS-> An operating system that manages a group of independent computers and makes them appear to be a single computer is known as a distributed operating system. Distributed computations are carried out on more than one machine. When computers in a group work in cooperation, they make a distributed system.

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