On 30 Mar 2007 at 0:00, Steve Thatcher wrote: I remember reading that article when it came out. I recall the neon- bulb ring counters--they looked like a nightmare to get right and something that would eventually require more tweaking as the bulbs aged. There were other "computers" that made their showing at science fairs. One was a tic-tac-toe playing design that, IIRC, used Stroger switches (something that might have also worked for the calculator shown in the magazine article).