CHEMISTRY
Periodic Table of the Elements
Periodic Table - WebElements

METRICS & MEASURES

CONVERSION CHART
IFP : Metric Conversion Tables
Measures, Units and Conversions

The Metric System (SI)
 
HISTORY
HyperHistory 
WebChron
ASTRO GLOSSARY
Cosmic and Heliospheric Learning Center
APOD
Imagine the Universe! Dictionary 
DATA
U.S. Navy Observatory
Astronomical Applications Department

U.S. Naval Observatory
Astronomical Applications Dept
Data Services

The Phases of the Moon 
Sun and Moon Data for One Day 
Star List 
Astronomy Tools 
Stars and Constellations
 
PHYSICS
Electromagnetic Spectrum
   
GEO/MAPS
ZIP, LAT&LOG,ELEVATION 
PCL Map Collection 
World Map 
GLOBAL COORDINATES by city

Astrodienst Zürich Atlas
and Timezone Database

clickable map of the world

MISC
Merriam-Webster OnLine Dictionary
A Dictionary of Scientific Quotations
Encyclopedia of Philosophy
Genesis Networks - The Bible
Encyclopedia.com
2think.org
(science, philosophy book reviews)
     
SEARCH
Netscape/Jeeves/etc 
Overture.com 
Infoseek 
LookSmart 
Yahoo! 
SOCIETY
Demographics: State Rankings 
The Almanac of Politics and Government 
Bureau of Justice Stats Homicide by race 
U.S. Census Bureau Home Page 
US Census Bureau: Subjects Index 
Demographics: State Rankings 
CIA: TheWorld Factbook
demographics by zipcode
Ethnicity and Race by Countries
IDB Data Access--Display Mode
Library of Congress