Andrei Broder is a Research Fellow and Vice President of Emerging Search Technology for Yahoo!. He previously has worked for AltaVista as the vice president of research, and for IBM Research as a Distinguished Engineer and CTO of IBM's Institute for Search and Text Analysis. Broder's research centers around the internet, and internet searching. He is credited with being one of the first people to develop a CAPTCHA, while working for AltaVista. Wikipedia
The definitive Wikipedia entry for Andrei Broder. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Andrei_Broder