One of these eighty-column punch cards is blue, the other yellow. The corners are rounded with the upper left hand corner truncated. A Bell Telephone Laboratories logo is at the center of both cards. A mark along the bottom edge of both cards reads: BELL TELEPHONE LABORATORIES, INCORPORATED JTC 1967 MILITARY MANUFACTURING INFORMATION DEPT. E-7583-E(7-57). A mark along the left side reads: GENERAL APPLICATIONS CARD.
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