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IBM 557 information


Punched card phone bill with interpreted data

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,[1] 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.

  1. ^ "IBM Card Interpreters".

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