On Nov 14, 2014, at 7:43 PM, Cory Smelosky <b4 at gewt.net> wrote: Evening, What IS the current copyright status on TOPS-10/20? Who owns it? I assume it's still copyrighted I assume...and I doubt the current copyright owner would bother to enforce their rights to it. If it was copyrighted originally, that copyright is certainly still valid. Anything that didn t expire prior to the last set of changes will remain valid for decades, thanks to the Mickey Mouse Protection Act. Interesting question who owns it. Did HP get that piece of DEC? paul