GoogSpy is a site that lets you see what companies have purchased Adwords on Google. This GoogSpy result shows who owns the semantic web, for example. Only one company, Stylus Studio, owns RDF and eBay claims sole ownership of OWL. You can see the other Adwords that these companies have purchased (e.g., a company that bought “semantic web” also bought “universal computer”). Finally, you can see all of the Adwords purchased by a given company. Microsoft bought quite a few, including linux.