Xenix wasn't created by SCO, it was developed by Microsoft (initially for the PDP-11) and was based on licensed AT&T Bell Labs code (and some BSD). SCO ported

Xenix wasn't created by SCO, it was developed by Microsoft (initially for the PDP-11) and was based on licensed AT&T Bell Labs code (and some BSD). SCO ported Xenix to a few processors for Microsoft starting with 8086/8088. It wasn't until 1987 that SCO ownership of Xenix.