A classical way of using T E X in printed typesetting was enhanced for use of the same T E X source to publish electronically. A handbook of algebra and a 4-year journal archive (280 articles) were electronically published using the same T E X source files to produce both the PDF in a form for reading on-screen and a version for printing a hard copy. A package written in plain T E X provided for the mark-up of the logical structure, cross-references, bibliographical references, author names,

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... words and symbols. The hypertext contents, index pages and a complete navigation system are also made in PDF and were pre-programmed at the T E X level. Being completely a PDF product the same publications are thus usable on any computer system for which a PDF viewer exists.