Raspberry Pi: How This Cheap Computer Changed the World

The Raspberry Pi changed the world. It’s small, affordable, and can be used in many different computing projects.
Today the Raspberry Pi is a phenomenon, the world’s third best-selling, general-purpose computer. If you’re interested in computers, chances are you’ve got one of the tiny British-made boards tucked away somewhere. It’s inside laptops, tablets, and robots; it has run experiments on board the International Space Station; it has spawned a massive ecosystem of kits for learning about computers; and it has even broken into mainstream media.
For a couple years now, a someday goal of mine is to build a Raspberry Pi supercluster. What will I use it for? No clue, but it sounds and looks cool.