Health Physics Society(http://www.hps.org/) Scientific and professional organization whose members specialize in occupational and environmental radiation safety.
Nuclear Magnetic Resonance Information Server(http://www.spincore.com/nmrinfo/) Links to facilities, meetings, organizations, software covering NMR, MRI and electron spin resonance.
Radiation Protection(http://www.umich.edu/~radinfo/) Quick links to current topics, organizations and societies, educational resources and an introduction to radiology.
Radiation Information Network(http://www.physics.isu.edu/radinf/#gen) Idaho State University’s portal site to radiation information, glossaries, professional organizations and regulatory sites.