Encyclopedia > I > IBM 557
IBM 557
The IBM 557 Alphabetic Interpreter (photo) allowed holes in punch cards to be interpreted and the Hollerith punch card characters printed on any row or column, selected by a control panel. The machine was a synchronous system where brushes would glide over a hole in a punch card and contact a brass roller thereby setting up part of a character code.
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
Encyklopedie (cz) Encyklopédia (sk) Enzyklopädie (de)