CAPTCHA
COMPUTER TEST TO DISCRIMINATE HUMAN USERS FROM SPAMBOTS
Visual confirmation; Captchas; Completely Automated Public Turing Test to Tell Computers and Humans Apart; Completely automated public Turing test to tell computers and humans apart; Captcha; Word verification; Automated Turing test; Human verification; Image Verification; Capatcha; Email logic puzzles; Turing image; CATCHPA; Prove You're Human; Capcha; Turing Number; MAPTCHA; CATPCHA; Catchpa; CAPCHA; Maptcha; EZ-Gimpy; C.A.P.T.C.H.A.; Completely Automated Public Turing Test To Tell Computers and Humans Apart; Gausebeck-Levchin test; Completely Automated Public Turing test to tell Computers and Humans Apart; Human interaction proof; Human Interaction Proof; Gausebeck–Levchin test; Circumvention of CAPTCHAs
A CAPTCHA ( , a contrived acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart") is a type of challenge–response test used in computing to determine whether the user is human.