Here is a short history of who has powered Yahoo's searches:
???? - 2001: Inktomi
2001 - 2004: Google
2004 - 2010: Yahoo
2010 - ????: Bing
It will be interesting to see who will power Yahoo after Bing.
???? - 2001: Inktomi
2001 - 2004: Google
2004 - 2010: Yahoo
2010 - ????: Bing
It will be interesting to see who will power Yahoo after Bing.
Loads and loads of sites, Yahoo is more a content provider than anything or anyone else.