To be fair, Apple generally buys small companies and adds their capabilities to their toolbelt, rather than growing its size through acquisition and Amazon is s

To be fair, Apple generally buys small companies and adds their capabilities to their toolbelt, rather than growing its size through acquisition and Amazon is similar. Now if you mean LINES of business, then yes, they both regularly expand into new lines of business and then dominate them, either in skimming the profit (ala Apple) or just altogether (Amazon.)