OK, so who knows the sequence and differences
between:
MP/M-86
Concurrent CP/M-86
Concurrent PC-DOS (announced by DRI at Comdex, because IBM did NOT
trademark "PC-DOS" ("It's a description, not a name"), but
then DRI backed
down and changed the name)
Concurrent DOS
DR DOS
Very good, Fred! The answer to your question is "Fred Cisin"!
;)