Bing Adds Search History To Auto-Suggest, Matt McGee, Search Engine Land (March 1)
Bing is using your search history in its auto-suggest feature. It will include in the auto-suggest list queries that you have run before over time. Search history will show as purple and other autosuggest will be blue. The auto-suggest box offers options like “Manage History” and “History Off” for searchers who don’t this feature enabled.