typeracer

The Altair was tedious to use. At first, the only way that data and instructions could be given to the computer was by flipping switches. Take something trivial like 2+2. Each 2 needed eight different switches to be flipped, then a ninth switch was used to load them all. 'And' required another nine switches. The answer 4 was if the third light from the left turned on. Eureka!