From: grarpamp <grarpamp@gmail.com> https://www.youtube.com/watch?v=wxL4ElboiuA I was first exposed to Nixie tubes in about 1968, when my father took me to his office (Marley Co, manufacturer of cooling towers) and saw a Wang desktop calculator.  Calling it a desktop calculator was somewhat optimistic, because a thick cable actually connected it to a suitcase-sized box in a nearby closet.  http://www.oldcalculatormuseum.com/wang360.html            Jim Bell