Charta perforata
Charta perforata, sive charta IBM et charta Hollerith, est charta rigida quae data digitalia a foramina praesentia aut absentia in positionibus praedeterminatis repraesentata habet. Hoc autem tempore est modus ad data imprimenda obsoletus, sed per saeculum undevicenimum ad telas gubernandas late adhibebantur et posteriori parte saeculi undevicensimi et anteriori parte saeculi 20 ad organa prati festivi et instrumenta similia agenda. Per saeculum vicensimum in instrumentis tabulae unitariae ad datorum initum, tractandum, et recondendum usae sunt. Computatra digitalia antiqua chartis perforatis usa sunt, quae machinis perforandi saepe praeparatae sunt, ut modus primus dati programmaturaeque initandi. Nonnullae machinae suffragationis et censi chartis perforatis utuntur.

Memoria computatralis

Bibliographia
Austrian, Geoffrey D. 1982. Herman Hollerith: The Forgotten Giant of Information Processing. Novi Eboraci: Columbia University Press. ISBN 978-0-231-05146-0.
Cemach, Harry P. 1951. The Elements of Punched Card Accounting. Sir Issac Pitman & Sons.
Fierheller, George A. 2006. Do not fold, spindle or mutilate: the "hole" story of punched cards. Stewart Publishing. ISBN 978-1-894183-86-4. PDF. 
IBM. 1963. How to Succeed At Cards (Film). Pellicula. IBM..
Lubar, Steve. 1991. "Do not fold, spindle or mutilate: A cultural history of the punch card." Maius. Archivum interretiale.
Murray, Francis J. 1961. Mathematical Machines. Vol. 1: Digital Computers. Caput 6: Punched Cards. Novi Eboraci: Columbia University Press.
Solomon, Martin B., Jr., et Nora Geraldine Lovan. 1967. Annotated Bibliography of Films in Automation, Data Processing, and Computer Science. University of Kentucky.
Truedsell, Leon E. 1965. The Development of Punch Card Tabulation in the Bureau of the Census 1890-1940. Vasingtoniae: Government Printing Office.

Apparatus computatralis
Charta