Everyone knows a nerd or two. Do you know the top nerds in the world, and by top, I mean the people who took visionary nerdiness, elbow grease, and luck and translated it all into billion dollar companies? Below, you will find 15 faces (nine singles, 3 doubles). Most readers will be able to name 3 or 4. Real techies can name 5-10. If you can name more, you are a true guru. All 15? Well, there’s a special place for you.