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The Berkeley Software Distribution [a] (BSD), also known as Berkeley Unix or BSD Unix, is a discontinued Unix operating system developed and distributed by the Computer Systems Research Group (CSRG) at the University of California, Berkeley, beginning in 1978.
The names FreeBSD and OpenBSD are references to software freedom: both in cost and open source. [42] NetBSD's name is a tribute to the Internet, which brought the original developers together. [43] The first BSD mascot was the BSD daemon, named after a common type of Unix software program, a daemon.
CRUX is a Linux distribution mainly targeted at expert computer users. It uses BSD-style initscripts and utilizes a ports system similar to a BSD-based operating system. Chimera Linux: Chimera Linux is a Linux distribution created by Daniel Kolesa, a semi-active contributor to Void Linux. It uses a userland and core utilities based on FreeBSD.
A selection of significant Unix versions and Unix-like operating systems that descend from BSD includes: FreeBSD , an open source general purpose operating system. Orbis OS , Sony's fork of FreeBSD 9 is the operating system for the PS4.
FreeBSD is a free-software Unix-like operating system descended from the Berkeley Software Distribution (BSD). The first version was released in 1993 developed from 386BSD [3] —the first fully functional and free Unix clone—and has since continuously been the most commonly used BSD-derived operating system.
All versions of BSD from its inception up to 4.3BSD-Reno are based on Research Unix, with versions starting with 4.4 BSD and Net/2 instead becoming Unix-like. Furthermore, 8th Edition Research Unix and on-wards had a close relationship to BSD. This began by using 4.1cBSD as the basis for the 8th Edition.
Linux: GPL version 2 only: Monolithic with modules C: 1:1 Unix-like: 4.4 elks: FreeBSD: BSD; GPL, LGPL software usually included Monolithic with modules C 1:1 BSD, Unix-like 11 DragonFly BSD OpenBSD: BSD Monolithic C 1:1 BSD, Unix-like 6.4 MirOS: NetBSD: BSD Monolithic with modules C 1:1 BSD, Unix-like 7.0 OpenBSD DragonFly BSD: BSD Hybrid: C 1 ...
Linux distributions that have highly modified kernels — for example, real-time computing kernels — should be listed separately. There are also a wide variety of minor BSD operating systems, many of which can be found at comparison of BSD operating systems .