The role and nature of a virtual terminal

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Abstract
Recently there has been a growing activity directed towards the definition of standards to facilitate the handling of a variety of terminals in a data network. The Virtual Terminal approach, favoured for some research networks, can seem an over-complex solution unless the proposals are seen in the wider context of a general method for information exchange between computer systems. This note examines the principles underlying the Virtual Terminal, and tries to indicate the merit of this approach. The ideas described are not new; a few are so obvious as to be common knowledge, some come from early work on standards internal to particular computer systems, and the remainder appear in current working papers circulating in EIN, Euronet, IFIP/INWG, and in the literature (see list of references). For this reason, no attempt is made to give a detailed description of any particular Virtual Terminal specification.

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