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  2. Comparison of operating systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_operating...

    These tables provide a comparison of operating systems, of computer devices, as listing general and technical information for a number of widely used and currently available PC or handheld (including smartphone and tablet computer) operating systems.

  3. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    An operating system is difficult to define, [6] but has been called "the layer of software that manages a computer's resources for its users and their applications". [7] ...

  4. Real-time operating system - Wikipedia

    en.wikipedia.org/wiki/Real-time_operating_system

    A real-time operating system (RTOS) is an operating system (OS) for real-time computing applications that processes data and events that have critically defined time constraints.

  5. List of Microsoft Windows versions - Wikipedia

    en.wikipedia.org/wiki/List_of_Microsoft_Windows...

    Timeline showing releases of Windows for personal computers and servers. Microsoft Windows is a computer operating system developed by Microsoft.It was first launched in 1985 as a graphical operating system built on MS-DOS.

  6. Mobile operating system - Wikipedia

    en.wikipedia.org/wiki/Mobile_operating_system

    A mobile operating system is an operating system used for smartphones, tablets, smartwatches, smartglasses, or other non-laptop personal mobile computing devices.While computers such as typical/mobile laptops are "mobile", the operating systems used on them are usually not considered mobile, as they were originally designed for desktop computers that historically did not have or need specific ...

  7. Monolithic kernel - Wikipedia

    en.wikipedia.org/wiki/Monolithic_kernel

    Structure of monolithic kernel, microkernel and hybrid kernel-based operating systems A monolithic kernel is an operating system architecture with the entire operating system running in kernel space.

  8. Unix-like - Wikipedia

    en.wikipedia.org/wiki/Unix-like

    Evolution of Unix and Unix-like systems, starting in 1969. A Unix-like (sometimes referred to as UN*X, *nix or *NIX) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification.

  9. List of Linux distributions - Wikipedia

    en.wikipedia.org/wiki/List_of_Linux_distributions

    This is an accepted version of this page This is the latest accepted revision, reviewed on 3 February 2025. List of software distributions using the Linux kernel This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article relies excessively on references to primary sources. Please improve this ...