Darren New <dne### [at] sanrrcom> wrote:
> Thinking on it, the difference was speed. Was it a mechanical card reader or 
> an optical card reader.  Did it shine light thru the holes? Then you could 
> slide a stack of cards past pretty much as fast as you want, which was good 
> if you had a giant IBM or something and you wanted to do lots of processing. 

  Wasn't that the idea with punched tape? (Although punched tapes might
actually predate punch cards...)

-- 
                                                          - Warp

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