It seems like every year we witness a host of tech companies initiate million- and billion-dollar bids to snatch up their biggest competitors or the next major start-up. Predicting the aftermath of any corporate buyout is impossible. Some might have the potential to become success stories such as Apple’s acquisition of NeXT. Others are doomed to crash and burn like the AOL and Time Warner merger. Whatever the outcome, only a number of mergers and acquisitions have gone on to be remembered for changing to landscape of the tech industry. From the evolution of Microsoft to Facebook’s unprecedented mobile move, these are the 15 Most Important Tech Acquisitions of All Time.