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IBM 557
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[[File:Turnaround card.agr.jpg|thumb|Punched card phone bill with interpreted data]] The '''IBM 557 Alphabetic Interpreter''' allowed holes in [[punched cards]] to be interpreted and the [[Punched card#IBM 80-column format and character codes|punched card characters]] printed on any row or column, selected by a [[plugboard|control panel]]. Introduced in 1954,<ref>{{cite web |url=http://www.columbia.edu/acis/history/interpreter.html |title = IBM Card Interpreters}}</ref> the machine was a [[Synchronization (computer science)|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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