Hi, I recently picked up in a lot of other stuff four DC600 tapes which is an interesting mix. I have no idea what systems they are for, maybe you do or have a need for such? Stardent 2.2 Diagnostics 1989-Part #125-0023-06 Kubota Pacific Computer 2.5 Diagnostics 1992-Part #125-0023-11 An unlabeled Tektronics tape, and another unlabeled 3M one. Mike