The history of Xenix
In the November 1980 issue of BYTE, the publication reported that Microsoft signed an agreement with Western Electric for the rights to develop and market UNIX from Bell Laboratories. The version of UNIX from Microsoft was to be specifically for the PDP-11, the Intel 8086, the Zilog Z8000, and the Motorola 68000, and its name was XENIX. Its major selling points were that it was supposed to be available for 16 bit microcomputers and that it would have MS BASIC, FORTRAN, and COBOL which were already widespread.
Bradford Morgan White
The story of Xenix, Microsoft's UNIX.