- Luis von Ahn
- Computer science professor, Carnegie Mellon University
- Speaking at PopTech 2009
- October 2009
- Camden, Maine
Harnessing brainpower: von Ahn invented ReCaptcha, a program that uses squiggly characters that humans easily decipher but blocks spambots – and helps digitize millions of old texts. The CMU professor also makes games that use human knowledge to improve computers. Find them at gwap.com .