Felt and Wire is a nice blog conceived at Mohawk paper, and covering a number of useful topics related to printed matter.
American Institute of Graphic Arts.
Printing Industries of America – Also incorporates several other organizations including the Graphic Arts Technical Foundation,
IAPHC – The International Association of Printing House Craftsmen
Institute of Paper Science and Technology at Georgia Tech.
AF&PA – American Forest and Paper Association
American Printing History Association.
Flexographic Technical Association.
GAA – The Gravure Association of America, Inc.
National Association of Printing Ink Manufacturers, Inc.
National Association for Printing Leadership.
NPES – The National Association for Suppliers of Printing, Publishing, and Converting Technologies.
npes.org
Printers’ National Environmental Assistance Center.
Specialty Graphic Imaging Association.
TAPPI – Technical Association of the Pulp and Paper Industry.
U.S. Screen Print and Inkjet Technology.
Waterless Printing Association.
CIP4 – Cooperation for the Integration of Processes in Prepress, Press and Postpress.
FSC – Forest Stewardship Council.
ICC – International Color Consortium.
Icograda – International Council of Communication Design.
ISTD – International Society of Typographic Designers.
Institute for Sustainable Communication.
PEFC – Programme for the Endorsement of Forest Certification.
W3C – World Wide Web Consortium.
Other Organizations and Institutions that impact Printing and Graphic Arts Industries:
EPA – Environmental Protection Agency.
NOAA – National Oceanic and Atmospheric Administration.
FCC – Federal Communications Commission.
FDA – Food and Drug Administration.
OSHA – Occupational Health and Safety Commission.
ISO – International Organization of Standards.
ISM – Institute for Supply Management.
Adobe, Inc.
Apple, Inc. – (Microsoft to a lesser extent)
Pantone, Inc.
Xerox Corporation.