Related Clues:

• Technology that I guess has outed me as a robot because I always get it wrong
• Letters you see to be typed, for example S-K-I-P T-E-A
• Challenge to prove you're human
• Modern screen test
• Turing test to tell machines and humans apart
• Spell check?
• Test for screening out bots
• Weapon against automated enemies
• Personal check?
• Challenge for a web user
• 'I'm not a robot' test
• Test to keep out bots
• Top, non-European technology linked to advanced verification program
• Modern test of humanity
• Page in contract on a security system