> Nixie tube is a tiny electrical tube with filaments in the shapes of all the digits stacked one on top of another, and it displays the desired digit by making just that filament glow
Lol, no. That's a Numitron (although they were 7 segment)
Also, Nixie Tubes were absolutely not “tiny.” Typically, they were about the same size as a vacuum tube you’d find in the back of your radio or TV. They were universally used on electronic equipment; less so on consumer devices.
[dead]
You are confidently incorrect.
https://ethw.org/Nixie_Tubes