A closer look

Before Alexa was awkwardly listening to your private arguments, a giant mainframe was making shopping lists. The ECHO IV was constructed in 1966 by an engineer in his own home. It took up entire rooms, weighed eight hundred pounds, and was designed to compute shopping lists, control the home's temperature, and turn appliances on and off. Despite his genius, his wife reportedly absolutely hated it because it was deafeningly loud and took up half the kitchen space.