 Known revisions of MP/M-86 2.0 were dated 25 September 1981 and 5 October 1981.There also was an MP/M-86 2.1 dated 20 July 1982.MP/M-86 2.1 absorbed some of the technology of CP/M-86 1.1 (BDOS 2.2) to become Concurrent CP/M-86 3.0 (BDOS 3.0) in late 1982, which also added support for "virtual screens".