How will 3D printing change the world? Today, you can read about jewelry and custom can openers, much as three decades ago you could have read that the personal computer would enable people to keep their recipes organized. Of course, PCs became much more useful than that. Many entrepreneurs and small businesspeople can now run their entire operations on a computer, and people keep their recipes not only organized, but also online. They also track their workouts, monitor their babies, and amass huge collections of digital friends (for better or worse).
