Open source provides the competitive advantage in the Internet Age. According to the August Forrester Report, 56 percent of IT managers interviewed at Global 2500 companies are already using some type of open source software in their infrastructure and another six per cent will install it in the next two years. This revolutionary model for collaborative software development is being embraced and studied by many of the biggest players in the high-tech industry, from Sun Microsystems to IBM to Intel. "The Cathedral & the Bazaar" opens up a debate on open source. year. This revised and expanded paperback edition includes new material on open source developments in 1999 and 2000. Raymond's writing style accurately describes the benefits of open source software. With major vendors creating acceptance for open source within companies, independent vendors will become the open source story in 2001.