* [http://technews.bg/info.php?id=24611 Компютърът „проходил” с тъкачна машина през 19 век, technews.bg, посетено на 15.01.2012]
* {{En икона|en}} [http://www.cs.uiowa.edu/~jones/cards/ Doug Jones' Punch Card history site]
* {{En икона|en}} [http://homepages.cwi.nl/~dik/english/codes/80col.html Various punched card codes]
* {{En икона|en}} [http://www.wired.com/wired/archive/7.03/punchcards_pr.html ''The Undead'' - Wired magazine article about modern day use of punch cards]
* {{En икона|en}} [http://groups.msn.com/scottfisher/misc.msnw?action=ShowPhoto&PhotoID=201 Scott Fishers Pennsylvania turnpike Ticket, (IBM Punch card w square holes) toll ticket webpage 1970's]
