General (Non-Astronomical) Resources
(Rudimentary -- Under Revision)
Dictionaries & Encylcopedias
Equipment Guides
Photonics Directory Buyers' Guide
Financial
Currency Converter(Rates for 164 currencies)
Government
Firstgov (Official government gateways)
Firstgov for Science (Science information from government sources)
Statistical Abstracts of the United States
Maps
Phone and Postal
U.S. Post Office and Zip Codes