On Mon, 8 May 2000 20:41:18 EDT JArchibald at aol.com wrote:
>The chararacters '0' through 
>''9' had no overpunch (as they were called). The choices of overpunches (an 
>11-row, a 12-row, and both 11- and 12- row), gives one 30 more characters. 27 
>of these were 'A' through 'Z' (that is where the capital only mentality came 
>from) and the space ' ' character.
>
>WHAT WERE THE OTHER 3 CHARACTERS ??? Or have I forgotten some other 
>arrangement in the punch card encoding?

Jerry,

There were more combinations than that:

S through Z were 0-1 through 0-9

some others I *know* were on the keypunch

period - 12-3-8
plus - 12-6-8
comma - 0-3-8
ampersand - 12
parens - 12-5-8 and 11-5-8

Cheers,
Bob