I went scrounging a couple of days ago and found a big box of DC 30 tapes. Is anyone familar with these? Or know of any systems that use them? I THINK these came from a computerized component tester made by Seimens. They look like audio cassette tapes but are slightly larger. These tapes are made entirely of plastic and don't have the metal plate on one side like the DC 300 tapes, HP-85 tapes or DEC Compactapes. I think the Seimens component tester may be a rebadged tester make by Analog Devices. At the same place I found a big pile of Analog Devices plug-ins to mount and connect various types of ICs and other solid state devices but I didn't take the time to see if they fit the Siemens marked testers. Joe