CP/M 2.2 1983 Pickles & Trout LS-DOS v6.3.1A 1990 Misosys TRSDOS v1.2 1979 Tandy TRSDOS v2.0a 1980 Tandy TRSDOS II v4.2 & TRSDOS16 v4.1 1979 Tandy PROFILE II 1980 Tandy SCRIPTSIT 2.0 1981 Tandy XENIX v3.02 198? Tandy XENIX v3.2 1987 Tandy Xenix Development System v3.0 1985 Tandy