Apple, Google, Facebook, and Amazon have hundreds of millions of users, mountains of cash, and a burning desire to blast each other to smithereens

By Ashlee Vance

The four giants of consumer technology, Amazon.com, Apple, Facebook, and Google, have hundreds of millions of users. They also have mountains of cash, which they’re using to bash each other: iPad, meet Kindle Fire; Facebook, meet Google Plus; Google Gmail, meet Facebook Messages. All this is part of their war to win a most valuable prize: you.