All the numeric displays in the film use nixie tubes, and my curious 10-year-old self looked them up online and immediately fell in love with their retro look...
I've known about Nixie tubes since I was little, though I remember not really understanding what they were at first and thinking they were like the mini-LEDs in my bio-dad's TI-30.
(And then there was the Panaplex panels that a lot of 1970s and early 1980s stuff used. I remember Kmart used old DTS cash registers that used them until, like, 1988 or so.)
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