Source: The Manual.
In the early 1960s, an engineer named Bob Moog started tinkering with keyboards. He’d been working with theremins for quite a while and had observed the impression the relatively new electric guitar had made on music. The guitar and amp combo essentially solidified the creation of rock ‘n’ roll as we know it. Moog was moved to do the same for the piano, arming it with an electric charge and some custom effects.