CAPTCHA

Definition from Wiktionary, the free dictionary
Jump to: navigation, search

English[edit]

A typical representation of a CAPTCHA

Etymology[edit]

Coined by a team of researchers at Carnegie Mellon University in 2000 as a loose acronym of "Completely Automated Public Turing test to tell Computers and Humans Apart".

Noun[edit]

CAPTCHA ‎(plural CAPTCHAs)

  1. A computerized test requiring the user to type a displayed series of letters, etc., to demonstrate that he/she is a human and not a computer program.
  2. (by extension) Anything that a human must do to prove that they are not a computer.

Translations[edit]

Usage notes[edit]

Although occasionally spelt with lowercase letters (captcha), or with an initial uppercase letter (Captcha), most authors remain aware of its origin as an acronym and use uppercase.

See also[edit]