JD_Toims - 12:12 am on Sep 12, 2013 (gmt 0)
If I do a search here in the UK for the word "computer" then Dell is listed in the top five. The word computer does not appear anywhere on their homepage.
That could easily be something "knowledge graph related", where Dell is associated with Dell Computer. Computer(s) would likely be included in many links to the Dell site and also in many mentions of Dell in the text surrounding external links.
Interesting note about the results I got: I also have 7 local results, plus 3 news and 3 in-depth articles -- I personally don't see how any "non-webmaster" would see the result-set I'm see for the query as "bad" in any way. It's got everything most people I know would want to see/find and counting the news, local and in-depth articles there are 21 results on the page *but* there's only 1 add at the top.