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OPERATING SYSTEM

Mela.melinawati@yahoo.com 0853 68259178. OPERATING SYSTEM. Part of the Operating System. What is an operating system?.

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OPERATING SYSTEM

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  1. Mela.melinawati@yahoo.com 0853 68259178 OPERATING SYSTEM

  2. Part of the Operating System

  3. What is an operating system? • An operating system (sometimes abbreviated as "OS") is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. • The application programs make use of the operating system by making requests for services through a defined application program interface (API). • In addition, users can interact directly with the operating system through a user interface such as a command language or a graphical user interface (GUI)

  4. The most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers.

  5. Operating systems can be classified as follows: • Multi-user: Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even thousands of concurrent users. • Multiprocessing:Supports running a program on more than one CPU. • Multitasking: Allows more than one program to run concurrently. • Multithreading: Allows different parts of a single program to run concurrently. • Real time: Responds to input instantly. General-purpose operating systems, such as

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