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  1. op·er·at·ing sys·tem
    [ˈäpərātiNG ˌsistəm]
    noun
    operating system (noun)
    operating systems (plural noun)
    1. the software that supports a computer's basic functions, such as scheduling tasks, executing applications, and controlling peripherals.
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    noun
    ˈäpərātiNG ˌsistəm
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    operating system
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  3. Wikipedia
    https://en.wikipedia.org › wiki › Operating_system

    Operating system - Wikipedia

    An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost …
    Definition and purpose

    An operating system is difficult to define, but has been called "the layer of software that manages a computer's resources for its users and their applications". Operating systems include the software that is always running, called a kernel—but can include …

    Types of operating systems

    Multicomputer operating systemsWith multiprocessors multiple CPUs share memory. A multicomputer or cluster computer has multiple CPUs, each of which has its own memory. Multicomputers were developed because large …

    Wikipedia text under CC-BY-SA license
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  4. Britannica
    https://www.britannica.com › technology › operating-system

    Operating system (OS) | Definition, Examples,

    Nov 21, 2025 · Operating system, program that manages a computer’s resources, …

    • TechTarget
      https://www.techtarget.com › ... › operating-system-OS

      What is an Operating System (OS)? | Definition from …

      Oct 31, 2024 · An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other application …

    • Guru99
      https://www.guru99.com › operating-system-tutorial.html

      What is Operating System? Explain Types of OS, Features and ... - Guru99

      • See More

      Dec 26, 2025 · What is Operating System? Explain Types of OS, Features and Examples. What is an Operating System? An Operating System (OS) is a software that acts as an interface between …

    • educatecomputer.com
      https://educatecomputer.com › what-is-operating-system

      What is Operating System (OS) -Types, Examples

      Jan 28, 2025 · An Operating System (OS) is a software program that manages the hardware and software resources of a computer. It is like the manager of the …

    • GeeksForGeeks
      https://www.geeksforgeeks.org › operating-systems

      Operating System Tutorial - GeeksforGeeks

      6 days ago · An Operating System (OS) is a software that manages and handles hardware and software resources of a computing device. Manages computer …

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