8" floppies to back up our IBM Sys 38 a few decades ago. Don't forget the diskpacks that IBM maintained for banks. www.cs.auckland.ac.nz/historydisplays/FifthFloor/MagneticDataStorage/DataStorageImages/DiskPacks/CDCComputerRoom.jpg Our Tandem computers stood out in the field of blue. At the time I was working for MTech which we were the polo shirt guys as opposed to EDS who were the white shirt and tie guys. Wall Street wised up and started stealing our Tandem programmers for non stop program trading fault tolerant.