Definition: The acronym CAPTCHA, short for "Completely Automated Public Turing test to tell Computers and Humans Apart", is a test used on many websites to make sure that information entered is from an actual human, rather than computer generated.
CAPTCHAs can be found in many places, including:
- Comment forms on blogs and message boards
- Sign-ups for email accounts
- Social networking sites
The main purpose of CAPTCHAs are simply to ensure human participation rather than computer-created data.
