The Remington Rand 409 was a series of punched card calculators programmed with a plugboard, its prototype designed in 1949 and completed in 1951. It was sold commercially in three variants named for how many decimal digits they could read from a punched card, the UNIVAC 60 released in December 1951, the UNIVAC 120 in 1953 and the UNIVAC 40 in 1955, with 1,080 units produced by the end of 1961 before the line was discontinued in favor of the UNIVAC 1004 in 1962.
Facts
SignificanceThe first electromechanical computer of stand alone, modular design that allowed replacement of parts in modules, delivered to the Internal Revenue Service as its first business computer in 1952. 2 Sources
1. Remington Rand 409, Wikipedia
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The prototype model was designed in 1949 and finished completion in 1951.
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It was sold commercially in three variants named for how many decimal digits they could read from a punched card, the UNIVAC 60 released in December 1951, the UNIVAC 120 in 1953 and the UNIVAC 40 in 1955, with 1,080 units produced by the end of 1961 before the line was discontinued in favor of the UNIVAC 1004 in 1962.
View the Source2. First Business Computer, Historic Rowayton
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The 409 was the first electromechanical computer of stand alone, modular design that allowed replacement of parts in modules.
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