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The IBM 557 Alphabetic Interpreter ((photo) ) allowed holes in punched cards to be interpreted and the punched 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 punched card and contact a brass roller thereby setting up part of a character code. There are no 557's operating commercially in the world today. ==Available features== *Proof - Where the 557 verified, again through electrical mechanical means, that the information printed was correct. *Multiple Stacker - The printed card could be placed in a selected output stacker. *Selective Line Print – The standard 557 could only print on the top 2 horizontal lines (between the 12 and 11 rows and between the 11 and 0 rows). Selective Line print feature allowed you to print on one of 26 lines. *40 or 60 column card read. Standard punched card was 80 columns, but there were exceptions. *Master/detail printing. Text on a master card could be printed on following detail cards. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IBM 557」の詳細全文を読む スポンサード リンク
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