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Barbara Johnson of Chicago pushes one of ten buttons that puts one of the card cradles in place in one of the new motorized card-finding systems shown during the 13th Annual Chicago Business Show, March 3, 1952. The unit contains about 82,000 tabulation cards. Called “Simplafind”, it is a product of the Simpla Research and Manufacturing Co., Inc., of New York. The company was one of 77 manufacturers of business machine equipment to display their products at the Conrad Hilton Hotel in Chicago. (Photo by Edward Kitch/AP Photo)
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