US Census - IDB Data Set
The International Data Base (IDB) is a computerized source of demographic and socio-economic statistics for 227 countries and areas of the world. The IDB combines data from country sources (especially censuses and surveys) with IPC's estimates and projections to provide information dating back as far as 1950 and as far ahead as 2050
American Memory/Library of Congress Map Collections: 1544 to 1996
"The focus of Map Collections is Americana and Cartographic Treasures of the Library of Congress. These images were created from maps and atlases and, in general, are restricted to items that are not covered by copyright protection."
CIA World Factbook
A wonderful source for country information and maps.
"The Factbook is in the public domain. Accordingly, it may be copied freely without permission of the Central Intelligence Agency (CIA)."
Contains the on-line versions of books previously published in hard copy by the Federal Research Division of the Library of Congress under the Country Studies/Area Handbook Program sponsored by the U.S. Department of Army.
Dictionary of Abbreviations and Acronyms in Geographic Information System, Cartography, and Remote Sensing
Perry Castaneda Library Map Collection
Online maps from The Perry-Castañeda Library Map Collection at the University of Texas. Includes regional, world, and links to outline maps.