Extranets allow business clients to access parts of a company's private network via the Web. They allow companies to directly share information without having to request the information and wait for it to arrive. Examples include tracking packages through FedEx.com and UPS.com. SharePoint is all about sharing information, whether with colleagues or business partners. Using the Web, different people can access the same document and note any changes that have been made to it. This book explains how SharePoint programmers can modify networks to create a client extranet. As web-based data-collection continues to grow, enabling real-time movement will be more and more essential.