> On Aug 21, 2022, at 8:35 PM, W2HX via cctalk <cctalk@classiccmp.org> wrote:
> 
> I always thought it was interesting how 5 1/4 is 3U (rack units). I thought 
> there might have been some relationship to that. But could have been just 
> coincidence.

For floppies, likely yes.  That fact did get used later on, in storage arrays 
where you can line up 14 or so disk drives, standing on edge, in a 3U 19 inch 
rack mounted system.

        paul


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