1) Vacuum tube display
Found on
https://www.crosswordclues.com/clue/charactron
Charactron was a U.S. registered trademark (number 0585950, 23 February 1954) of Consolidated Vultee Aircraft Corporation (Convair) for its shaped electron beam cathode ray tube. Charactron CRTs performed functions of both a display device and a read-only memory storing multiple characters and fonts. The similar Typotron was a U.S. registered trad...
Found on
http://en.wikipedia.org/wiki/Charactron
No exact match found.
