Meet world's 5 richest tech billionaires

No. 3: Jeff Bezos

Net Worth: $25.2 billion

Jeff Bezos' Amazon.com is the world's largest internet retailer of any kind, reporting more than $61 billion in 2012 sales, up $13 billion from the previous year. His role in promoting e-commerce around the world has been widely recognized. After graduating from Princeton University Bezos worked for a few companies before he founded Amazon in 1994. He is also responsible for the popular Kindle electronic book reader.