IBM card sorter

An IBM card sorter is a machine for sorting decks of punched cards in the format popularized by the International Business Machines Corporation (IBM), which dominated the punched card data processing industry for much of the twentieth century. Sorting was a major activity in most facilities that processed data on punched cards using unit record equipment. The work flow of many processes required decks of cards to be put into some specific order as determined by the data punched in the cards. The same deck might be sorted differently for different processing steps. The IBM 80 series sorters sorted input cards into one of 13 pockets depending on the holes punched in a selected column and the sorter's settings.