The LINGUA Project International Electronic Mail Tandem Network, sponsored by the European Union, is described in a series of chapter-articles. Universities in a number of European countries and several non-European countries have collaborated in expansion of the network, related research projects, and development of instructional materials to facilitate language learning in tandem using the Internet. The report describes: the network's structure and operation (partner institutions, bilingual subnets, future prospects), underlying instructional principles (learner autonomy, instructional forms, academic advising); techniques for integrating e-mail tandem learning into language courses, including such issues as curriculum design, facilities, accreditation, translation, and examples of integration into a writing skills course and an intercultural studies curriculum; use of electronic discussion forums in each subnet for language and intercultural learning, including posting types, discussion topics, and student and teacher participation; obtaining membership and establishing new subnets; use of subnets for language pairs; and examples of tandem partnerships. Lists of institutions and individuals currently participating in the project are appended. Contains 59 references. (MSE)