According to Wikipedia, yes. "Microsoft did not sell Xenix directly to end users; instead, they licensed it to software OEMs such as Intel, Tandy, Altos and SC

According to Wikipedia, yes. "Microsoft did not sell Xenix directly to end users; instead, they licensed it to software OEMs such as Intel, Tandy, Altos and SCO, who then ported it to their own proprietary computer architectures." http://en.wikipedia.org/wiki/Xenix http://en.wikipedia.org/wiki/Xenix