NEW YORK (AP) — Amazon has become the second publicly traded company to be worth $1 trillion, hot on the heels of iPhone maker Apple.Amazon has revolutionized how people shop online and is the world's dominant internet retailer. In two decades the company expanded far beyond its bookseller beginnings, combining its world-spanning retail operation with less flashy but very profitable advertising and cloud computing businesses.The company's blowout success has made its founder and CEO, Jeff Bezos, No. 1 on Forbes' billionaires list this year.The Seattle-based company has cemented customer loyalty through its Echo voice devices and the Prime membership program that offers fast, free shipping as well as music and video streaming perks.Amazon's stock rose 1.7 percent in morning trading, putting its market value at just over $1 trillion, although the stock dropped back slightly after that.