Nixie tube
  • A gas tube filled with neon and a small amount of mercury and/or argon, whose ten cathodes are in the shape of numerals. When a voltage is applied to the appropriate pins, the tube glows displaying the desired number. Used, for instance, in calculators.
  • A Nixie tube utilized to display other information, such as letters, symbols, or the like. Used, for instance, in signs.

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