CDC 6600 - Why so awesome?

Paul Koning paulkoning at
Wed Jun 22 20:12:00 CDT 2016

> On Jun 22, 2016, at 8:40 PM, Fred Cisin <cisin at> wrote:
> Which was the first machine to have an optical card reader (V brass roller)?
> For card based data processing, such as what my father did for Office Of Civil Rights, that speed improvement made a big difference.

I'm not sure why that would make it faster.  I've only seen brass roller reading in an IBM card sorter, which ran probably as fast as, if not faster than, than the fastest card reader I've ever seen.


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