In this first handbook on Online Dispute Resolution (ODR) what is likely to become one of tomorrowand#8217;s incontrovertible topics in the field of arbitration, a well-known expert in ODR guides the reader through the reasons to use IT and its practicalities, the choices made by the prevalent arbitration institutions in this regard, and the legal limits to the use of such technologies. His powerful and#8216;toolboxand#8217; includes a wealth of practice guidelines, drafting suggestions for arbitrators or parties wishing to use IT, and checklists and reminders to be used in practice. Among the efficiency-promoting IT tools thoroughly explained are the following: and#8226; case management websites; and#8226; videoconferencing; and#8226; live notes; and#8226; ODR platforms as ready-to-use solutions; and#8226; online filing; and and#8226; e-mail. The presentation focuses on the IT systems developed by major arbitral institutions like the International Chamber of Commerce (ICC), the American Arbitration Association (AAA), and the World Intellectual Property Organization (WIPO), with detailed guidance through their case management websites, virtual case rooms, extranets, and other IT tools allowing multiparty communications.