VINTAGE Set of 20 COMPUTER PROGRAM PUNCH CARDS For Sale

VINTAGE Set of 20 COMPUTER PROGRAM PUNCH CARDS


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VINTAGE Set of 20 COMPUTER PROGRAM PUNCH CARDS:
$5

Set of 20 COMPUTER PROGRAM PUNCH CARDS
Used at ATT telephone switching machines 1970's 1980's80 columns includes cards for "preamble" " used to Cancel x Mode Operation""card preceding group of y-cards" input cards


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