Consumer Price Index: Published by the Bureau of Labor Statistics, the CPI is the most widely used measure of inflation and a key indicator of the effectiveness of government monetary policy.

Peterson's College Guide: Search for colleges, practice taking SATs, look for financial aid.

Statistal Abstract: The U.S. Census Bureau has the most comprehensive compilation of statistics about the U.S. Good for state ranking, comparing different types of data and accessing frequently used tables.

Switchboard: Residential and business addresses.

U.S. Zipcodes: U.S. Postal Service official database.