PDF Zone - Solutions for the PDF Professional.

Planet PDF - A vast online information center on PDF.

PDF-X.com - Central souce for the latest PDF/X information.

DDAP Association - The DDAP Association is a nationwide group of graphic arts professionals dedicated to integrating the publishing and advertising industries through digital technologies. TIFF/IT Checker and PDF/X-1 Verifer, and the free TIFF/IT Photoshop Plug-in software

Association of Graphic Communications - The Association of Graphic Communications has training courses available and other related support.

Adobe Inc. - A vast online information center on Adobe products and training courses available and other related support.

DISC - The Digital Image Submission Criteria (DISC) Metadata for Digital Image Submission Specification defines standard metadata fields to be attached to digital images for submission to magazines for publication.

Graphics Communications Association - A volunteer non-profit membership association was formed to apply computer technology to printing, publishing, and related industries.

IDEAlliance - A non profit membership organization dedicated to advancing user-driven, cross-industry specifications & best practices for all publishing and content-driven enterprises.

International Prepress Association - The IPA is a trade association consisting of the world's leading graphic communications and graphic arts supplier companies.

SWOP Incorporated - Specification for Web Offset Publications, the mission of SWOP is to continually raise the level of quality of publication printing.