CAPTCHA

Summary

CAPTCHA is an access control^[1]. CAPTCHA draws 1,783 Wikipedia views per month (access_control category, ranking #2 of 4).^[2]

Key Facts

• CAPTCHA's image is recorded as Captcha.svg^[3].
• CAPTCHA's instance of is recorded as access control^[4].
• CAPTCHA's GND ID is recorded as 4828986-3^[5].
• CAPTCHA's Library of Congress authority ID is recorded as sh2009002990^[6].
• CAPTCHA's Bibliothèque nationale de France ID is recorded as 17001362r^[7].
• CAPTCHA's IdRef ID is recorded as 189468181^[8].
• CAPTCHA's has use is recorded as discrimination^[9].
• CAPTCHA's Commons category is recorded as Captcha^[10].
• +2000-01-01T00:00:00Z marks the founding of CAPTCHA^[11].
• CAPTCHA's Freebase ID is recorded as /m/01hl4j^[12].
• CAPTCHA's official website is recorded as http://captcha.net^[13].
• CAPTCHA's described by source is recorded as Security Engineering: A Guide to Building Dependable Distributed Systems, 2nd edition^[14].
• CAPTCHA's Encyclopædia Britannica Online ID is recorded as topic/CAPTCHA^[15].
• CAPTCHA's different from is recorded as reCAPTCHA^[16].
• CAPTCHA's FAST ID is recorded as 1747935^[17].
• CAPTCHA's Quora topic ID is recorded as CAPCHA^[18].
• CAPTCHA's Zhihu topic ID is recorded as 19560490^[19].
• CAPTCHA's named by is recorded as Luis von Ahn^[20].
• CAPTCHA's named by is recorded as Manuel Blum^[21].
• CAPTCHA's named by is recorded as John Langford^[22].
• CAPTCHA's named by is recorded as Nicholas John Hopper^[23].
• CAPTCHA's Microsoft Academic ID is recorded as 163339463^[24].
• CAPTCHA's National Library of Israel J9U ID is recorded as 987007542910105171^[25].
• CAPTCHA's Namuwiki ID is recorded as CAPTCHA^[26].
• CAPTCHA's GitHub topic is recorded as captcha^[27].

Why It Matters

CAPTCHA draws 1,783 Wikipedia views per month (access_control category, ranking #2 of 4).^[2] CAPTCHA has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[28] CAPTCHA is known by 38 alternative names across languages and contexts.^[29]