Concurrent DOS XM

Digital Research Concurrent DOS XM can run multiple CP/M-86 and DOS programs concurrently and supports up to three users.

Versions

 * Oct 1986: Concurrent DOS XM 5.0 (BDOS 5.0)
 * Jan 1987: Concurrent DOS XM 5.1
 * Sep 1987: Concurrent DOS XM 5.2


 * Concurrent DOS XM 6.0 (BDOS 6.0)
 * Concurrent DOS XM 6.01
 * Dec 1988: Concurrent DOS XM 6.2
 * Concurrent DOS XM 6.21