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GNU is a recursive acronym for "GNU's Not Unix!", [6] [12] chosen because GNU's design is Unix-like, but differs from Unix by being free software and containing no Unix code. [ 6 ] [ 13 ] [ 14 ] Stallman chose the name by using various plays on words, including the song The Gnu .
Unix (/ ˈ j uː n ɪ k s / ⓘ, YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969 [1] at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. [4]
The name GNU is a recursive acronym for "GNU's Not Unix". [17] Soon after, he started a nonprofit corporation called the Free Software Foundation to employ free software programmers and provide a legal infrastructure for the free software movement.
Below are other certified Unix operating systems: [4] macOS: Heavily based on BSD, macOS is registered as certified Unix 03 brand on both versions (Intel and Apple silicon-based). SCO OpenServer: Another operating system by SCO. Registered as Unix 93 “single and Multi-processor Industry Standard Intel architecture platform”.
Examples of operating systems that do not impose this limit include Unix-like systems, and Microsoft Windows NT, 95-98, and ME which have no three character limit on extensions for 32-bit or 64-bit applications on file systems other than pre-Windows 95 and Windows NT 3.5 versions of the FAT file system. Some filenames are given extensions ...
The first goal of the GNU Project was to create a whole free-software operating system. Because UNIX was already widespread and ran on more powerful machines, compared to contemporary CP/M or MS-DOS machines of time, [18] it was decided it would be a Unix-like operating system. Richard Stallman later commented that he considered MS-DOS "a toy".
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 February 2025. Software licensed to ensure source code usage rights Open-source software shares similarities with free software and is part of the broader term free and open-source software. For broader coverage of this topic, see open-source-software movement. A screenshot of Manjaro Linux running ...
XNU ("X is Not Unix") is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X (now macOS) operating system and released as free and open-source software as part of the Darwin OS, which, in addition to being the basis for macOS, is also the basis for Apple TV Software, iOS, iPadOS, watchOS, visionOS, and tvOS.