This document summarizes Skype's growth and milestones over its first 5 years, from 2003-2008. In 2003, Skype launched as free internet telephony and had over 100 million calls in its first 2 days. By 2004, it had over 1 billion calls, versions for PocketPC, Linux, and Mac, and was averaging 9.5 billion minutes and 50 million concurrent calls per week. In 2005, Skype expanded to allow free calls worldwide. By 2006 it had over 500 million concurrent calls and versions for Windows 2.0 and Mac 2.0. In 2007 Skype hit 5 billion calls, 2.2 million users, and 1,000 million concurrent calls. In 2008, Skype conversations total