Physics

Biographical information about award winners with a description of their discovery, provided by the Stanford Linear Accelerator Center Library.
http://www.slac.stanford.edu/library/nobel/

Physical constants, atomic and molecular spectroscopy, ionization, X-rays and gamma-rays, radiation dosimetry, nuclear physics, condensed matter.
http://physics.nist.gov/PhysRefData/contents.html

Physics news and jobs from the Institute of Physics, plus many useful links to reference and educational sites behind the "Resources" tab.
http://physicsweb.org/

Resource for high school and introductory college students, with lessons and reviews organized by topic.
http://www.sciencejoywagon.com/physicszone/

Appealing collection of reference sources, directories, teaching, and employment information.
http://www.physlink.com/

http://www.aapt.org/

http://www.aip.org/

http://www.aps.org/

http://www.iop.org/

http://www.nist.gov/