Gates was spot on with many of his bold predictions. Chip Somodevilla / Getty In 1999, Bill Gates wrote a book titled "Business @ the Speed of Thought."

In it Gates made 15 predictions that at the time might have sounded outrageous.

But as Markus Kirjonen, a business student, said on his blog, Gates' forecasts turned out to be eerily prescient.

Here are the 15 predictions Gates made about 20 years ago — and how close they've come to being true.

Eugene Kim and Biz Carson contributed to earlier versions of this article.