Graduate programs in Physics- for those who want more
Physics and Astronomy internet resources- there's a lot out there.
American Chemical Society- for chemistry info
IEEE- for electrical engineering info
American Radio Relay League- for short-wave radio and emergency communications
Braille Institute- needs volunteer readers
Daresbury synchrotron (UK)- high energy optical research
Naval Research Lab- the Navy does much more than go to sea!
National Science Foundation, Division of Material Research- supports our research