Someone suggested H11 and I'd bet that one is more encumbered as it was a version of RT and I think Heath was licensed from DEC. < Obviously, I don't own a license for RT-11. And assume that the commerci < license from Mentec is probably much more than a hobbyist would pay to < tinker with old machines. Has anyone approached Mentec about the Unknown, Megan any idea of cost? < they would be more apt to create one. From what I can tell, an old PDP < with no software license is virtually useless, except for < hacking/curiosity value. After a half hour of playing around with the Maybe someone could create an OS for the PD, patterned after CPM or ???. < would be without the VMS-hobbyist license. I mean, who _really_ wants t < run BSD on all of your old hardware? It kind of defeats the whole < purpose of collecting the old machines if you have the same stupid Unix < prompt on your VAX, Sparc 1, Mac IIfx, 486PC, etc... That is especially true if your not into unix though, that is an option for those that are. Allison