On Apr 19, 2013, at 12:32 PM, Cory Smelosky wrote: ... IBM made me do it! Speaking of IBM...what'd be the maximum storage capacity of a punched card? I was thinking of TCP/IP over paper tape last night... I sense an april 1 RFC here... :-) Classic 80 column punched card: 120 bytes if punched in unrestricted "column binary", 80 byte if punched in extended EBCDIC code (as on the IBM 360 green card) where only one of rows 1-7 is punched per column. paul