Health Physics Society
National HPS
National HPS Chapters
East Tennessee Chapter HPS
Florida Chapter HPS
Alabama Chapter HPS
Arkansas Chapter HPS
North Carolina Chapter HPS
Ohio Chapter HPS
Cincinnati Radiation Society of the HPS
Savannah River Chapter HPS
South Texas Chapter HPS

Emergency Management Homeland Security
Federal Emergency Management Agency
Current Threat Level
READY CAMPAIGN

American Association of Physicists in Medicine (AAPM)
National AAPM             SE AAPM            Florida AAPM_

Education and Information   
Understanding Radiation
Radiation Glossary (USNRC)  
Radiation Protection Basics
Periodic Table of Elements (Los Alamos Nat'l Lab)         

Other Useful Links  
Conference of Radiation Control Program Directors
American Association of Radon Scientists and Technicians
International Commission on Radiological Protection
International Radiation Protection Agency
Radiological Society of North America
American Nuclear Society