A Nixie tube, or cold cathode display, is an electronic device used for displaying numerals or other information using glow discharge.
Inside a broken Nixie tube
Systron-Donner frequency counter from 1973 with Nixie-tube display
This ИН-19А (IN-19A) Nixie tube displays symbols, including % and °C.
ИH-14 (IN-14) Nixie tubes displaying "25". The 5 is implemented with an upside-down 2.
A display device is an output device for presentation of information in visual or tactile form. When the input information that is supplied has an electrical signal the display is called an electronic display.
Nixie tubes, LED display and VF display, top to bottom
Display board at Frankfurt (Main) Hauptbahnhof (2005)
Digital clocks display changing numerals