This volume results from a meeting that was held in Barcelona, Spain, April 1993, under the auspices of the DELTA programme of the European Commission. DELTA (Developing European Learning through Technological Advance) is the commission's technology R&D programme that concentrates on "Telematic Systems for Flexible and Distance Learning." The overarching goal of this programme is to contribute through information technology to more efficient and effective design, production, and delivery of learning material. The DELTA programme started its main phase in 1992 with a total of 22 projects and a...