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

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