With Mac OS X Server v10.3, Apple has integrated popular open source software technologies and created innovative management tools to make it easy to provide powerful standards-based server solutions. With over 150 new features, including centralized directory and authentication for Mac and Windows clients, Mac OS X Server is a comprehensive platform that is ideal for corporate and educational institutions. This Unlimited-client edition of Apple's award-winning UNIX-based server operating system is the most cost-effective way to support your Mac and Windows workgroups. The Mac OS X Server Unlimited-client edition is perfect for classroom labs, creative professionals and medium-to-large workgroups with high volumes of file sharing activity.