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electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube … Universalium
List of Stanford University people — This is a list of encyclopedic persons (students, alumni, faculty or academic affiliates) associated with Stanford University in the United States. University presidents #David Starr Jordan (1891 – 1913) #John Casper Branner (1913 – 1915) #Ray… … Wikipedia
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia

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