10 Sep 2011
Captcha: Luis van Ahn
Luis van Ahn is one of the inventors of the 'captcha'. They're that box of squiggly letters you have to decipher and type out. Now they're being used to digitise the world's books!
Luis van Ahn is one of the inventors of the 'captcha'. They're that box of squiggly letters you have to decipher and type out. Now they're being used to digitise the world's books!