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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 allocation of processor time, mass storage, peripherals, and ...
This is a list of operating systems. Computer operating systems can be categorized by technology, ownership, licensing, working state, usage, and by many other characteristics. In practice, many of these groupings may overlap. Criteria for inclusion is notability, as shown either through an existing Wikipedia article or citation to a reliable source.
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. The article "Usage share of operating systems" provides a broader, and more general, comparison of operating systems that includes servers ...
Comparison of open-source operating systems. These tables compare free software / open-source operating systems. Where not all of the versions support a feature, the first version which supports it is listed.
Get step-by-step instructions for determining the operating system (OS) version on your devices and why it is so important to keep the OS updated.
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. The initial version was followed by several subsequent releases, and by the early 1990s, the Windows line had split into two separate lines of releases: Windows 9x for consumers and Windows NT for businesses and enterprises. In the following ...
Linux ( / ˈlɪnʊks / LIN-uuks) [11] is a family of open-source Unix-like operating systems based on the Linux kernel, [12] an operating system kernel first released on September 17, 1991, by Linus Torvalds. [13] [14] [15] Linux is typically packaged as a Linux distribution (distro), which includes the kernel and supporting system software and libraries, many of which are provided by the GNU ...
The current Mac operating system is macOS, originally named "Mac OS X" until 2012 and then "OS X" until 2016. [3] It was developed between 1997 and 2001 after Apple's purchase of NeXT. It brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced, such as ...