International university and research institute telecommunication links provide free or low-cost access to several computer networks (commercial and non-commercial). Previously used by science researchers, such networks are now used in clinical and social medicine. University affiliation, a personal computer, and a modern and software are needed. A host-computer, at a local computing centre, operates server software that automatically distributes information to subscribers. The server stores all messages in a monthly logbook that can be edited to produce an electronic magazine. The magazine can also be accessed by non-subscribers. The software gives convenient, fast, single-key processing of messages and files and also allows on-line conferences. Discussion groups on several medical specialties and data bases for AIDS and other communicable diseases are already operating.