Computer Systems Research Group
- CSRG may also refer to China South Locomotive and Rolling Stock Industry (Group) Corporation
- or Chauchat Sutter Ribeyrolles Gladiator World War I era machine gun.
The Computer Systems Research Group (CSRG) was a research group at the University of California, Berkeley that was dedicated to enhancing AT&T Unix operating system and funded by Defense Advanced Research Projects Agency.
Professor Bob Fabry of Berkeley (University of California) acquired a UNIX license from AT&T in 1974. Berkeley started to adjust UNIX and distributed their version of UNIX as BSD. In April 1980 Professor Fabry signed a contract with the Defense Advanced Research Projects Agency to develop UNIX even further to accommodate the specific requirements of the ARPAnet. With the funding of DARPA, Fabry created the Computer Systems Research Group. The BSD Sockets API and Berkeley Fast File System are some of the most noteworthy innovations of the group.
During the 1970s and 1980s, AT&T raised the licensing fee for UNIX to $100,000–$200,000. This became a big problem for small research labs and companies who used BSD and the CSRG set up a goal for themselves to replace all the source code that originated from AT&T. They succeeded in 1994, but AT&T didn't agree and took Berkeley to court. After the settlement in 1994, CSRG distributed its last versions, called 4.4BSD-Lite (BSD-licensed) and 4.4BSD-Encumbered (UNIX-licensed).
The group was disbanded in 1995, though not without leaving a legacy - 386BSD, NetBSD, FreeBSD and OpenBSD are all based on the 4.4BSD-Lite distribution and continue to play an important role in the open-source UNIX community today, including dictating the style of C programming used via KNF in the style man page.
Noted former members of the CSRG include Keith Bostic, Bill Joy and Marshall Kirk McKusick. Berkeley Software Design and Sleepycat Software (later acquired by Oracle) can be considered spin-off companies of the Group.
- The Computer Systems Research Group 1979 — 1993
- A more detailed article
- Marshall Kirk McKusick. "Twenty Years of Berkeley Unix - From AT&T-Owned to Freely Redistributable". O'Reilly Media. Retrieved 2008-09-25.
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