Yeah I saw that when going down my rabbit hole. Definitely a cool and useful thing for what it is.

I just think that Concurrent DOS is cool because it is proper multitasking; proper time slicing and everything! And you could have multiple users logging into the same computer with terminals, à la Unix, all in the mid 80s!

I have been trying to track down whoever the hell owns the license to Concurrent/Multiuser DOS to try and make a case for them to release the source code, but I have had a heck of a time getting ahold of anyone that might be able to point me in the right direction. I suspect the rights for it now reside with OpenText or something and they don’t even realize it.