Knowing Atari, there tapes were most definitely written on a PDP-11 system. == They are discs, not tapes. Atari switched from development on PDP-11's (an 11/60 that actually was at Weird Stuff when they were next door..) to a VAX in the early 80's. They are probably the RM05 packs from KIM:: -- I don't know about you, but I would be pretty surprised if Curt is going to find someone willing to put an unknown 12 platter pack in their RM05. I dont think Scopus or any of the disc inspection companies are even around any more. I have several dozen of those same vintage packs that I'm terrified to even try to put in a drive (not for a VAX..)