Asynchronous Transfer Mode (ATM), one of the key technologies in the transition to broadband telecommunications, is used to transmit "data, video and voice at ultra high speeds." This home page for the ATM Forum is a good place to learn about the technology and its many applications. For people unfamiliar with ATM, the Beginner's Guide to ATM explains some of the basic principles involved in digital communication. More informed readers can download specifications, white papers, case studies, or a user handbook. Those interested in compatibility issues will find discussions of ATM's interworkings with Gigabit Ethernet, DSL, and other wireless mediums.