cien - 3:01 pm on Jul 16, 2010 (gmt 0) [edited by: cien at 3:08 pm (utc) on Jul 16, 2010]
Search and ad serving. I know I'm getting in the lion's mouth here since it seems everybody has a different meaning for "monopoly". Even Microsoft spending a lot money in advertising is going basically nowhere. Google is way too big to beat. At least in France they are a clear monopoly owning 90% of searches.
This topic has been debated for years now and it never gotten anywhere.
[edited by: cien at 3:08 pm (utc) on Jul 16, 2010]