This document is a presentation by Chris DiBona, the Open Source Programs Manager at Google. The presentation discusses Google's use of open source software and their contributions back to the open source community. It notes that Google's server infrastructure uses in-house rack designs with PC-class motherboards and low-end storage and networking hardware running Linux and their in-house software. The presentation also discusses why people release code openly, with a study finding the top motivations are intellectual curiosity, skills improvement, career advancement, and helping other developers.