UCSD links:
The Library system: http://www.libraries.ucsd.edu/
Computing services: http://www-acs.ucsd.edu/
Component vendors:
Hardware:
McMaster Carr: www.mcmaster.com
Key-High Vacuum products: http://www.keyhigh.com/
Thermionics: www.thermionics.com
Electronics:
Newark: www.newark.com
Jameco: www.jameco.com
Stanford Research Systems: http://www.thinksrs.com/
Keithley: www.keithley.com
Optics:
Thorlabs: www.thorlabs.com
Academics:
Mathematics
Physics