The Raspberry Pi is a personal computer at its most Zen: motherboard, memory, connectors, and not much else. Named after the Lilliputian berry, the bare-bones Pi is the brainchild of British chip architect Eben Upton, who was inspired to get cheap PCs into the hands of would-be programmers. But the Pi, which is sold by Upton's nonprofit, has become a hit with do-it-yourself techies. "It appears that we've gotten to a million units inside our first year," says Upton. "It's staggering."