(
GNU's
Not
Unix) A Unix-like operating system developed by the free software movement starting in 1984. In 1992, the almost-complete GNU system was combined with the Linux kernel, producing the GNU/Linux system. The GNU Project developed many of the core programs in GNU, but also included available free software such as the X Window System and TeX. See
GNU Project,
GNU/Linux,
Free Software Foundation,
free software and
Linux.