The E6-B flight computer is a form of circular slide rule used in aviation. It is an analog calculating device still being used in the 21st century.
The front of a metal E6-B
An E6-B flight computer commonly used by student pilots.
Closeup photo of a metal E6-B
Closeup photo of a cardboard E6B
The Norden Mk. XV, known as the Norden M series in U.S. Army service, is a bombsight that was used by the United States Army Air Forces and the United States Navy during World War II, and the United S
The Norden bombsight at the Computer History Museum in Mountain View, California. This example is only the bombsight itself; it does not include the associated autopilot that would normally connect to it on the bottom.
Norden bombsight on display at the Imperial War Museum in Duxford, with the stabilizer assembly attached
Enola Gay bombardier Thomas Ferebee with the Norden bombsight on Tinian after the dropping of Little Boy
A Norden bombsight in the nose of the B-29 FIFI