Amazon and Google, both giants in the online business world, started out as separate entities with two very different agendas. As each has grown into an empire, the overlapping areas of business between the two companies has grown as well. But with both companies moving strongly into the electronic device market, cloud services, and Amazon now building out its advertising network, they find themselves increasingly at odds, and 2013 may bring more direct battles."Amazon wants to be the one place where you buy everything. Google wants to be the one place where you find everything, of which buying things is a subset. So when you marry those facts I think you're going to see a natural collision," said VC partner Chi-hua Chien. Adds Reuters, "Not long after Bezos learned of Google's catalog plans, Amazon began scanning books and providing searchable digital excerpts. Its Kindle e-reader, launched a few years later, owes much of its inspiration to the catalog news, the executive said. Now, Amazon is pushing its online ad efforts, threatening to siphon revenue and users from Google's main search website."