[citation][nom]sykozis[/nom]MS did it with buyouts and questionable licensing practices. Google is doing it by trying to lock their competition out of any Google products.[/citation]
well don't forget these buyouts:
2004
Keyhole, Inc - The company made Earth Viewer which was renamed to Google Earth
2006
YouTube - still called YouTube
2007
DoubleClick - was a widely used advertising and launching point for web developers which was just obsorbed by Google who then gained all of it's customers, contacts and methods
2007
GrandCentral - they services and products later became known as Google Voice
2009
On2 Technologies - which was a video software maker
2009
Aardvark - this company had a social network search engine and was a small player on the social network scene but did have a lot of interesting ideas, and of course now we're seeing Google with it's new social networking products and services
2010
Agnilux - This was a small hardware startup which, in my opinion, may allow Google to become more like Apple with their own computers and own software running on them. Maybe it's a stretch, but shortly after the purchase we found out about those mysterious Google laptops getting shipped to select testers for feedback.
2010
Global IP Solutions - a company based in Norway providing web-based teleconferencing and related services which will enable Google to add telephone-style services to its list of products.
2010
AdMob - another ad network but this time specializing in mobile services and devices
Now also keep in mind this list does not include the numerous "deals" and "partnerships" that Google has struck to "allow" itself and these partners to has better search results for things like video services, social networking, higher res satellite imagery for itself, advertising, and YouTube access.
Most of this info can be found very easily, and here I will provide a Wikipedia link as the source for most of what I listed above.
http://en.wikipedia.org/wiki/Google#Acquisitions_and_partnerships
I hope you all see this as only a chance to be informative and mostly fact based, since I tried to sound non biased or opinionated about any side of this story.