A closed source UNIX maintained by the SCO Group since 1989. Originally a bare bones OS for OEMs to customize, the server and desktop were later added
Alternate names: SCO OpenServer, SCO Open Desktop, Xenix
The first video game about SCO UNIX was released in 1983.
SCO Group is what became of Santa Cruz Operation. SCO UNIX replaced SCO Xenix (As SCO Xenix was the most widly used of all their varients) and was based on the 386 version of AT&T UNIX System V Release 3.2. SCO UNIX was designed as a base OS for small to medium sized business to customize to their own needs. Originally there was no desktop environment or TCP/IP networking included. SCO Open Desktop was a separate product and in 1994 SCO began selling packages that could be added to SCO UNIX to make it more complete, including SCO MPX, and SCO SMP. Well known companies such as Banco do Brasil, Big O Tires, Costco pharmacy, McDonalds, NASDAQ, Pizza Hut, Taco Bell, The Toronto Stock Exchange, many banks in Russia and China, and the railway system of India use SCO OpenServer. In the late 1990s, SCO had 15,000 customers using their UNIX versions.
Significant portions of a complete SCO UNIX operating system include opensource code. Some of the projects commonly included are Apache, BIND, DHCP, KDE, Mozilla, MySQL, OpenSSH, Perl, PostgreSQL, Samba, Sendmail, Tcl, X11. These applications can be found in SCO Skunkware, a freely redistributable package of opensource apps available as an iso, ftp, CD-ROM or repository.
In 1995 SCO acquired all intellectual property rights to UNIX and UNIXWare. Though a judge later ruled that Novel owned all UNIX source code created before 1995; entitling Novel to collect licensing fees on all SCO's UNIX derivatives which the judge set at $2.5 million. The legal details are not fully settled yet (2008-12-30). Novel has not initiated any demand for fees, SCO can appeal.
SCO currently maintains UnixWare 7 and UNIX 8. SCO OpenServer and SCO Open Desktop are based on UNIX 8.
SCO filed Chapter 11 Bankruptcy 2008-09-14. They continue to support UNIX for now.