Anybody have any suggestions aout how to identify what drive/system these are for? I picked up several 15" removeable disk cartridges earlier this week but I don't know what drive or system they're for. It looks like they came from a GenRad test station so it was probably some kind of DEC based system. A couple of the disks say "Scopus Corporation System 90". Anybody have any idea what that is? One disk was made by Magntic Data and is a model 46. Another was made by Nashua and it's model 4416-16. I just found another marking that says one of the disk is for a GenRad 1796 ssytem. Anybody know anything aboutt the Genrad test stations? I think I have all of the system disks for that system. FWIW the system was used for testing a transponder for the MilStar satellite. Joe