A strange little side quest
A small trivia drop for Cannons and Soldiers: Space Invaders arrived in 1978 and helped turn electronic games from an arcade curiosity into mainstream entertainment. That is only half the story. In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. That gives Cannons and Soldiers a little more company than it first appears to have.