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Part 1 Introduction. Part 2 Electronic mail and other media. Part 3 When is electronic mail successful? value for people and organizations: new communication or old communication in a new medium?; changes to organizations; will electronic mail improve companies?; exchange of experience using electronic mail; the roles of bosses are changed; group size and the critical mass hypothesis; examples of observed effects of E-mail/CMC; co-ordination and decision making. Part 4 Cost/efficiency analysis: how cost/efficiency analysis can be used; can the productivity of office work increase?; comparison with telephone calls; comparison with postal mail, message slips, telex and telefacsimile; comparison with face-to-face meetings; comparison with audio and video conferencing and voice mail systems; when is electronic mail the best medium?; the value of changed communication patterns. Part 5 User functionality with electronic mail: personally addressed mail; automatic mail; simultaneous text communication; multi-media documents and voice mail; office documents (EDI), forms, work flow applications; folders, archives; group communication; filters; anonymity and pseudonymity; mail servers; directories; co-working with other media; reliability and security; roles. Part 6 Techniques for electronic mail: transmission of messages (routing); naming and addressing; architecture of electronic mail systems; distribution lists; computer conferencing and bulletin board systems; cryptographic security techniques. Part 7 Standards: about standards in general; text formats; the OSI model; X.400/MHS - the OSI standard for electronic mail; X.500 - the OSI standard for directory systems; internet mail standards; bitnet format; UUCP format and usenet news; VMSmail; application programming interfaces; gatewaying standards; deviations between standards and reality; functional standards and implementors' guide; PICS proforma. Part 8 The market for electronic mail: history; software; public services; public messaging systems and conference systems; fees and charging. Part 9 Law and order: ethnics and etiquette; human rights issues; freedom of information acts; printed matter; computers and privacy legislation; copyright laws; unlawful communication; agreements and signatures; legal recipients; which law is applicable; who is legally responsible; law enforcement actions. Part 10 Research about electronic mail - user interface examples: examples from the user interface of pine; examples from the user interface on superKOM; examples from the line oriented user interface on EAN/Envoy 400; examples from the user interface on memo; examples from the user interface on first class. postal addresses of E-mail organizations; glossary; standards documents - ISO and ITU standards; internet documents (A selection).