SCO is an acronym for The Santa Cruz Operation, Inc., the old name for this firm. In 2001, Caldera Systems, Inc., bought the OS division, the majority, of SCO, Inc. The Caldera-based firm now does business as (d/b/a) The SCO Group. The remainder of the original SCO, Inc., is now d/b/a Tarantella, Inc. The SCO Group develops and sells these Linux and Unix operating systems: Linux (OpenLinux), Unix (OpenServer, OpenUnix, UnixWare). In 1995, SCO, Inc., bought the rights to the AT&T UNIX(tm) trademark and intellectual property from Novell, Inc. This is now owned by The SCO Group.