IBM 557

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The IBM 557 Alphabetic Interpreter allowed holes in punched cards to be interpreted and the punched card characters printed on any row or column, selected by a control panel. Introduced in 1954, the machine was a synchronous system where brushes would glide over a hole in a punched card and contact a brass roller thereby setting up part of a character code. rdf:langString
rdf:langString IBM 557
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rdf:langString The IBM 557 Alphabetic Interpreter allowed holes in punched cards to be interpreted and the punched card characters printed on any row or column, selected by a control panel. Introduced in 1954, the machine was a synchronous system where brushes would glide over a hole in a punched card and contact a brass roller thereby setting up part of a character code.
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