Yahoo Press is a publishing partnership between O'Reilly Media and Yahoo! Inc., designed to showcase the breadth and depth of Yahoo's technology expertise. Conceived in 2007, our first title was published in the spring of 2008. The Yahoo Press imprint provides a way for Yahoo employees and expert authors from across the Internet to share their knowledge. Because of Yahoo's vast scale, Yahoo web development tools and technologies are deployed and rigorously tested in the most varied and challenging Internet environments, which means that developers can count on us to provide technical information and insight of the highest quality and usability.