CAPTCHA

Completely Automated Public Turing test to tell Computers and Humans Apart or CAPTCHA was invented in 2000 as a means to deter bots and spam on publicly available websites. CAPTCHA tests aim to…

reCAPTCHA was acquired by Google in 2009 and has since been used to protect websites from botting, crowdsource transcription work, and to mass train Google's other technical ventures such as…