>> Suppose an 80 column card with 10 bits/column.  That is 800 bits per 
>> card. 
> 
> No. If you punched all the holes out of the card (a so-called 'lace 
> card'), it wouldn't go thru the reader. It was 7 or 8 bits per column. 
> Even binary punched on the card was spread out so it wouldn't make too 
> many holes.
> 
>> Maybe 20 cards per second through a reader ?  Could be higher since 
>> those things were really impressive bits of engineering.
> 
> Some of them were very fast. Most were closer to 5 or 10, unless you had 
> a really high-end giant machine.

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