8" hard sectored disks

I recently found a large number of hard sectored 8" disks and I was hoping some one might knows what computers would use these disks. * Dysan 3740/2D, Double sided, Double density, format: 128 bytes/26 sectors, index 1 & 2. (I don't know if these are hard sectored. There is just one index hole in the disk but two index holes in the jacket) * Memorex 3201-3015, Compatibility: Shugart, Write protect, Single sided, Single density, Sectoring: 32 hard (Just regular 32 sector hard sectored disks) * Memorex 3071-2003, Single sided, Single density, Sectoring: hard * Verbatim FD 65-9000-HR, Single side, Single density, Vydec/ Memorex compatible. (These have 33 index holes in the disk, but they are arranged around the out side edge of the disk. Also there is a 1 1/2" x 1/2" notch cut out one of the corners of the jacket.) I could not find a web page for Dysan, I searched Memorex's and Verbatim's pages and I emailed Memorex and got no reply. ========================================= Doug Coward dcoward(a)pressstart.com Senior Software Engineer Press Start Inc. Sunnyvale,CA Curator Museum of Personal Computing Machinery http://www.best.com/~dcoward/museum =========================================