40pcs VINTAGE MAINFRAME COMPUTER PUNCH CARDS. IBM 80-column card format 70-80s

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Soviet punch cards made similar as IBM format and have 80 characters as standard. Total one punch card can save only 24 machine word.

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IBM 80-column card format 70-80s. Ibm 80-Column Card F. Soviet punch cards made similar as IBM format and have 80 characters as standard. Total one

40pcs VINTAGE MAINFRAME COMPUTER PUNCH CARDS. IBM 80-column card format 70-80s