This information sheet defines teleconferencing as a meeting of three or more people at different locations by telephone and communicating via audioconferencing, audio plus graphics, slow scan television, or full motion video conferencing, and discusses some of the advantages and various applications of this technology. Three major projects that have been influential in the implementation and use of teleconferencing in the United Kingdom (UK) are described: the University of Wisconsin's Educational Telephone Network (ETN); the Learn Alaska Network in the United States; and the Open University in Great Britain. Current developments in teleconferencing in the UK are reported via a discussion of its use as an educational tool and brief descriptions of 13 projects, which range from tutoring groups of medical students dispersed in local hospitals and distance education programs in music and technology, to continuing education for veterinarians and staff development. The work of PACNET (Plymouth Audioconferencing NETwork Project) is highlighted because of its significant contribution in exploring audioconferencing in education and training. Guidelines for getting started with audioconferencing include information on choosing telephone systems and equipment, companies that provide audioconferencing services, and devices that can be used on public networks. Also included are a glossary and a list of 22 selected readings. (DJR)