Eric Emerson Schmidt (born April 27, 1955) is an American software engineer, businessman and the current executive chairman of Google. From 2001 to 2011, he served as the chief executive of Google. Additionally, Schmidt was a former member on the board of directors for Apple Inc. and sat on the boards of trustees for both Carnegie Mellon University and Princeton University. Along with Mike Lesk, Schmidt co-authored the lex analysis software program for the Unix computer operating system.