This is a one page presentation of the historical development of the audion tube. An image of DeForest's invention is included.

American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...

John Ambrose Fleming was an electronics pioneer who invented the oscillation valve, or vacuum tube, a device that would help make radios, televisions, telephones and even early electronic computers possible. A brilliant innovator,...

English scientist William Crookes was very innovative in his investigations with vacuum tubes and designed a variety of different types to be used in his experimental work. Crookes tubes are glass vacuum chambers that contain a positive...

The ENIAC (Electrical Numerical Integrator and Computer)was a large computer based on vacuum tubes and introduced in 1946. This lecture gives a brief presentation of the ENIAC.