Prototype IBM DemiDiskette drive

On Wed, 22 Aug 2018, Chuck Guzis via cctalk wrote: Well, that was a significant part of the "shirt pocket disk" arguments. George Morrow said, "Why don't we just negotiate with the garment industry to make shirt pockets five and a quarter inches?" 3" (Amstrad) and 3.5" (Sony) made it to market. The Demi-Diskette never made it to market. The 3.25" ALMOST made it to market. It was used on the "Seequa Chameleon 325". So technically, it made it to market. Dysan (3.25") did not want to go with a hard shell. The 3.25" had a metal center hub, but was the same jacket material as 5.25 and 8 inch. Besides shirt pocket dimensions, Dysan reasoned that the winner would be the one that had software availability. So, they bet the company (literally) on software publishing in 3.25". For a brief time, you could have purchased most of the major software packages on 3.25" disk! Dysan software publishing had more titles than Lifeboat. When that did NOT win the war, Dysan never really recovered. The 3.25" drives and diskettes that I have came from MicroPro (Wordstar). -- Grumpy Ol' Fred cisin at xenosoft.com