UnixWare is a flavor of the Unix operating system. It was originally released by Novell after they acquired UNIX System V from AT&T in 1993. Novell sold UnixWare in 1995 to the Santa Cruz Operation, which in turn sold its Unix-related businesses to Caldera Systems in 2001. Caldera changed its name to SCO Group in 2002, and this SCO Group is the current proprietor of UnixWare.