An electronic device used for displaying numerals or other information using glow discharge developed in the 1950's.  They're a glass tube filled with a low-pressure gas, such as neon, and contains a wire-mesh anode and multiple cathodes shaped like numerals or symbols.  Applying power to a specific cathode surrounds it with an orange glow discharge.

The technology was superseded in the 1970's by light-emitting diodes (LEDs) and vacuum fluorescent displays (VFDs).

h4. See also

* [[Steins;Gate]]
* [[Vacuum tube]] (a device of similar appearance)

h4. External links

* "Wikipedia - Nixie Tube":[https://en.wikipedia.org/wiki/Nixie_tube]
nixie tube