As a teen at Lakeside Prep School, Gates wrote his first computer program on a General Electric computer. It was a version of tic-tac-toe where you could play against the machine.
Once his school discovered Gates' coding abilities, they let him write the school's computer program for scheduling students in classes. Gates slyly altered the code so he was placed in classes with a "disproportionate number of interesting girls."
Gates also read the entire "World Book Encyclopedia" series during his teenage years.
Gates scored a near-perfect 1590 out of 1600 on his SATs.
Like many other successful tech entrepreneurs, Gates was a college dropout. He left Harvard University in 1975 to fully devote himself to Microsoft.
Two years after he dropped out of Harvard, Gates was arrested in New Mexico. He was driving without a license and ran a red light.
At Microsoft, Gates used to memorize employees' license plates to keep tabs on their comings and goings. "Eventually I had to loosen up, as the company got to a reasonable size," he said.
Speaking of cars, Gates has quite the Porsche collection. The headliner is his Porsche 959 sports car, which he bought 13 years before the car was approved by the US Environmental Protection Agency or the US Department of Transportation.
For air travel, Gates used to fly coach. Nowadays he gets around in the plane he's owned since 1997, which he calls his "big splurge."
Besides his plane, one of Gates' biggest splurges was the Codex Leicester, a collection of writings by Leonardo da Vinci. He acquired it at a 1994 auction for $30.8 million.
Despite his immense wealth, Gates says his kids will only inherit $10 million each — just a fraction of his $81.1 billion net worth. "Leaving kids massive amounts of money is not a favor to them," he says.
Though he spends most of his time with his foundation, Gates says he is still working with Microsoft on its "Personal Agent," which will "remember everything and help you go back and find things and help you pick what things to pay attention to."
Gates says if Microsoft hadn't worked out, he probably would've been a researcher for artificial intelligence.
Despite his interest in AI, Gates says he is "in the camp that is concerned about super intelligence." That camp also includes notable leaders in science in technology, like Stephen Hawking and Elon Musk.
Bill Gates' favorite band? Weezer. He also calls U2 a "favorite" and says he's still "waiting for Spinal Tap to go back on tour."
Gates says he reads 50 books a year. "Reading is still the main way that I both learn new things and test my understanding," he says.
Gates doesn't know any foreign languages. That, he says, is his biggest regret in life thus far.
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