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CurtMonash - 7:49 am on Feb 15, 2004 (gmt 0)
It doesn't seem likely that they bought ALL of Inktomi, Altavista, and ATW simply because they liked collecting search engine companies.
I've forgotten the exact sequence of who bought what when, but at least one of Altavista and ATW came into Yahoo's possession as a byproduct of their buying Overture.