Check out this interactive timeline documenting the history of federal taxation in the United States.

How did this day come to be the national day for taxes being due? What is it for? To find out the answers to these and other questions, visit this site from the Library of Congress.

Provides a commentary on whether paying taxes is voluntary or required. Good information, especially for younger taxpayers. (2001)

The Miller Center of Public Affairs at the University of Virginia offers biographical information on Abraham Lincoln (1809-1865 CE), including short-answer basics and a "Life in brief."