Woz. Steve Wozniak is the genius being Apple. Steve Jobs is normally (rightfully) given credit for founding Apple, though many people forget that Woz was at the heart of it all, too. Steve Wozniak actually wrote the code that was on the first Macintosh. He’s a multi-billionare, too now (obviously) as a result of Apple’s success. To learn more about the Wizard of Woz, click here.

Grace Hopper was a famous computer scientist and US navy admiral. She was one of the first programmers ever, and was a big part of the first computers ever to be used: the ENIAC. She also invented the first compiler (program which changes the code you see on screen into 1s and 0s in the computer). Whenever you hear a techie say there is a “bug” in the computer, it’s because of her – she coined that term. Learn more about ‘Amazing Grace’ here.

Mark Zuckerburg is now a household name. He studied Psychology as well as Computer Science at Harvard before dropping out (we’re starting to see a suspicious trend here) to seriously pursue Facebook full time. His extensive knowledge of code and programming gave him the tools to build this service, which has now impacted billions and made him billions, too. Learn more about Mark Zuckerberg here.