Alertbox article by Jacob Nielson discussing the limitations and pitfalls of PDF as an online publishing tool.

Web based tool to convert Microsoft Word documents to PDFs. Free conversion for limited time.

University of Nottingham research group dealing in, among other things, PDF. Papers, research reports on proposed PDF extensions, as well as downloadable and libraries.

An online hub for all things Acrobat and PDF. Plugins, utilities, useful tips, and newsletters.

Tutorials and utilities to help use Adobe Acrobat version 4 and above.

Overview of the format, troubleshooting, application support.

A site offering conversion to PDF from HTML documents. Commercial service that can be added to existing websites. Information and examples available.

Contains information and resources of free, shareware, and commercial document conversion software.

Article describing several possible techniques to merge two or more PDF files into a single PDF document, with comments on their effectiveness.

Polemic against PDF, focussing on the format's supposed lack of suitability for on-screen reading.