University of Houston
University of Houston: Engines of Our Ingenuity: No. 1319: Differential Analyzer
Read about the work of Vannevar Bush, who invented the differential analyzer, an analog computer. This is a transcript of a radio broadcast.
Other
The Antikythera Mechanism Learn About the Oldest Analog Computer
This site contains a history of and a variety of links for the Antikythera Mechanism.