Keypunch

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Hollerith keyboard (pantograph) punch in use.

A keypunch is a device used for the purpose of entering data onto punch cards by precisely punching holes in the cards at specific locations as determined by the keys struck by the operator. Early keypunches were manual devices. Later keypunches were electromechanical devices which combined several different functions in one unit. These often resembled small desks with keyboards similar to those on typewriters and were equipped with hoppers for blank cards and stackers for punched cards. Some keypunch models could print, at the top of a column, the character represented by the hole(s) punched in that column. The small pieces punched out by a keypunch fell into a chad box, or (at IBM) chip box, or bit bucket.

• See also: Wikipedia, Commons

• Related: Punched cards, Punched card input/output, Hollerith code, Unit record equipment

Columbia University Computing History: IBM Keypunc... Columbia University Computing History: IBM Keypunches www.columbia.edu/cu/computinghistory/keypunch.html - Web

IBM Archives: IBM 029 — Card Punch IBM Archives: IBM 029 — Card Punch www-03.ibm.com/.../vintage_4506VV4002.html - Web

IBM Archives: Working for the railroad (001 keypun... IBM Archives: Working for the railroad (001 keypunch) www-03.ibm.com/.../valueone_railroad.html - Web

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IBM Punched Card Accounting Machines (1955) IBM Punched Card Accounting Machines (1955) www.computercollector.com/archive/ibm/pcaa/ - Web

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