The Domain Name System (DNS), which matches computer addresses to human-friendly domain names, has given rise to many legal issues. Two important issues are the institutional arrangements for governing the DNS and the use of trade marks as domain names. This book is the first complete statement of this rapidly-evolving area of the law. In particular, the book includes a comprehensive statement of decisions under the Uniform Domain Name Dispute Resolution Policy (UDRP), the international system for resolving disputes between trade mark owners and domain name registrants. In this path-breaking work the author examines the extent to which principles of national trade mark law have been used in UDRP decisions. It will be essential reading for anyone, whether academic or practitioner, interested in internet law, intellectual property, and e-commerce law.