Berkely Software Design Inc. was a corporation which developed, sold licences to, and supported BSD/OS, a commercial and partially proprietary variant of the Berkeley Software Distribution operating system. It was founded by former members of the Computer Sciences Research Group at University of California, Berkeley, and the name was chosen for its similarity to Berkeley Software Distribution the source of its primary product. It contributed code and resources back to the open source BSD community.
In 2000, the company merged with Walnut Creek CDROM, a distributor of CD content, and later with Telenet systems. In 2001, it sold its software engineering activities to Wind River Systems and renamed itself iXsystems, with plans to specialize in hardware. iXsystems server business was acquired in 2002 by Offmyserver.