 In December 1983, a DOS emulator named PC-MODE became available as an optional module for Concurrent CP/M-86 3.1 (BDOS 3.1), shipping on 21 February 1984, and the system was further developed into the MS-DOS compatible Concurrent DOS (BDOS 3.1 and higher).This in turn continued to evolve into FlexOS and Multiuser DOS and as such is still in use in some industrial applications.MP/M 8-16 (sometimes also referred to as "MP/M-8/16") was CompuPro's name for a combination of the multi-user 16-bit MP/M-86 to perform single-user, single-stream CP/M functions, alongside with multi-user, multi-tasking 8-bit MP/M operations running on the multi-processor .