IBM 1442

IBM 1442

IBM 1442 was a combination IBM card reader and card punch. It read and punched 80-column IBM-format punched cards and was used on the IBM 1440, the IBM 1130, the IBM 1800 and System/360 and was an option on the IBM System/3. The 1442 could read up to 400 cards per minute. Cards were read and punched one column at a time and binary cards were permitted. Cards were read using photocells, illuminated by fiber optics, unlike the IBM 1402, which still used wire brushes to read cards. It was even possible to create (but not read) "IBM Doilies," cards with every possible hole punched. Few other pieces of IBM equipment could do this without sustaining damage.

There were two output hoppers, or stackers, located in the photo on the left lower side. One could program to select the output hopper for each card read, so it was possible to read cards and separate them into two groups. Cards were placed in the top hopper ("face down, nine-edge leading") and a plate was added on the top of the cards. They were read thru and came out to one of the left lower hoppers.

The 1442 did not print on the top of the cards; it just punched what characters the columns contained. An older unit record machine, the IBM 557 interpreter, could be used off-line for this function.

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