PHYSICS
APS - American Physics Society
http://www.aps.org/
Elemental Data Index - click on an element from the periodic table and have access to data from the NIST Physics Laboratory databases.
http://physics.nist.gov/PhysRefData/Elements/index.html
Physics Internet Resources - compiled by APS (American Physics Society), this site offers a large variety of internet links divided into fields of physics.
http://www.aps.org/resources/
PhysLink.com - is a comprehensive physics and astronomy online education, research and reference web site. The site is also a meeting place for professionals, students and other curious minds.
http://www.physlink.com/
Physics Today- the official site of the American Institute of Physics.
http://www.physicstoday.org/
Scholarly Societies in Physics - An extensive listing of web sites of scholarly societies in physics.
http://www.scholarly-societies.org/physics_soc.html
Sciseek - Science Search Engine - Covers agriculture, forestry, engineering, chemistry, physics, and the environment.
http://www.sciseek.com/