+A **Vacuum Tube** is an electronic device that controls the flow of [electrons](/wiki/electron) within an evacuated glass enclosure. Historically crucial for amplifying signals and switching, these components were largely superseded by [transistor](/wiki/transistor) technology.
+## See also
+- [Diode](/wiki/diode)
+- [Amplifier](/wiki/amplifier)
+- [Cathode Ray Tube](/wiki/cathode_ray_tube)
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