Hi, I read the earlier messages about DC100A v DC1000 tapes. I was given a DC1000 tape to try and sadly it didn't work in my HP-85. I found the following page which implies the DC1000 requires a stronger magnetic field than DC100A. So it's a bit like typing to use HD floppies in a DD drive. http://www.cybergenetic.ca/ebook/wrh13.htm (BTW these tapes are 0.15" not one eight of an inch). The following firm advertise DC100A, but I haven't bought any from them so don't know if they have any stock: http://www.athana.com/html/minicart.html HTH, John