it.wikipedia.org/wiki/CAPTCHA

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  URL ▴ Links
http://captcha.net/ 1
http://id.loc.gov/authorities/subjects/... 1
http://inglipnomicon.wikia.com/wiki/... 1
http://patft1.uspto.gov/netacgi/nph-... 1
http://research.microsoft.com/en-us/um/... 1
http://sam.zoy.org/pwntcha/ 1
http://www.cs.sfu.ca/~mori/research/... 1
https://ar.wikipedia.org/wiki/حروف_... 1
https://archive.is/20131028134534/http://... 1
https://az.wikipedia.org/wiki/CAPTCHA 1
https://bg.wikipedia.org/wiki/CAPTCHA 1
https://bn.wikipedia.org/wiki/... 1
https://bs.wikipedia.org/wiki/CAPTCHA 1
https://ca.wikipedia.org/wiki/Test_de_... 1
https://catalogue.bnf.fr/ark:/12148/cb170... 1
https://commons.wikimedia.org/wiki/?... 2
https://commons.wikimedia.org/wiki/... 1
https://commons.wikimedia.org/wiki/... 2
https://creativecommons.org/licenses/by-... 1
https://cs.wikipedia.org/wiki/CAPTCHA 1
https://d-nb.info/gnd/4828986-3 1
https://da.wikipedia.org/wiki/CAPTCHA 1
https://data.bnf.fr/ark:/12148/cb17001362... 1
https://de.wikipedia.org/wiki/Captcha 1
https://developer.wikimedia.org/ 1
https://donate.wikimedia.org/?wmf_source=... 2
https://el.wikipedia.org/wiki/CAPTCHA 1
https://en.wikipedia.org/wiki/CAPTCHA 1
https://eo.wikipedia.org/wiki/CAPTCHA 1
https://es.wikipedia.org/wiki/Captcha 1