Prototype IBM DemiDiskette drive

[Fred Cisin]

On Wed, 22 Aug 2018, Chuck Guzis via cctalk wrote:
> Out of curiosity, I measured the pocket the shirt I'm wearing.
> About 3.75" wide, so a 4" floppy would definitely not fit, while a 3.5"
> floppy fits comfortably.
> FWIW.

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