The Ghent PDF Workgroup (GWG)

The GWG creates and distributes free tools for PDF, workflow and more. Always following standards, always at no cost and designed to make your life easier.

Adobe Portable Document Format (PDF)

An open standard — PDF is a formal open standard known as ISO 32000. Maintained by the International Organization for Standardization, ISO 32000 will continue to be developed with the objective of protecting the integrity and longevity of PDF, providing an open standard for the more than one billion PDF files in existence today.

Adobe resources

Adobe PDF Transparency Adobe PDF Print Engine 2  Adobe Print Guide 5.5 Adobe Libraries

NPES Guide to PDF/X

Pass4Press Version 10 Guidelines

Pass4press is a set of guidelines, introduced and maintained by the PPA, for creating industry-standard PDF files for printing in the magazine sector.