By the late 1960s, minicomputers were sufficiently cheap to envision using them to automate much of the pricing and sale of groceries. RCA Corporation, working in conjunction with Kroger Company, developed a supermarket checkstand that linked to an RCA 6100 minicomputer. This is an example of the checkstand. It first operated at a Kroger’s store in Kenwood, Ohio, near Cincinnati, in July, 1972. The tests were quite successful, running for many weeks. However, the device relied on a different identification code than the Universal Product Code adopted the following year. RCA decided not to try to sell point-of-sale terminals.
Reference:
Stephen A. Brown, Revolution at the Checkout Counter:The Explosion of the Bar Code, Cambridge: Harvard University Press, 1997.
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