Introduction of 80-columns card format

1928
Introduction of 80-columns card format

Introduction of 80-columns card format, using rectangular punched holes, in numeric form only.. Replacement of 45-columns round holes cards Introduction of IBM 301 Accounting Machine (type IV tabulator), featuring handling of negative numbers by automatic recomplementation on X row operating at 100 cpm


 

 

 

 

Introduction of 80-columns card format

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