Re: "I just found a box of about 15: 8 inch floppies 32 sectors (hard sectored) Double Sided Single Density. Some are TDK F1-H. Any takers?" These are used in the Processor Technology Helios disk system (intended for, but not really specific to, the SOL-20 computer). I have what might be the last two such operational systems in existence, and I have to say that carefully because they have not been powered since 2004, when they were working and booting PT-DOS. However I have several boxes of the diskettes and don't really need more.