Everyone knows the CAPCHA tests on websites where you either have to click on numerous pictures of cars, traffic lights, or bicycles, enter confusing combinations of numbers and letters or simply click to confirm that you’re not a robot. There used to be so many of these tests that it was downright annoying, especially if you needed several attempts. But have you ever asked yourself whether a robot or an AI could also pass these tests? How does the CAPTCHA know that it was filled in by a human? And what does the term even stand for? Let’s clear up this mystery. What does CAPTCHA stand for?The …