Bing (search engine) as "Tiger", the new index-serving technology had been incorporated into Bing globally since August that year. In May 2012, Microsoft announced another redesign of its search engine that includes "Sidebar", a social feature that searches users' social networks for information relevant to the search query. , Bing is the third largest search engine in the US, with a query volume of 4.58%, behind Google (77%) and Baidu (14.45%). Yahoo! Search, which Bing largely powers, has 2.63%. Microsoft originally launched MSN Search in the third quarter of 1998, using search results from Inktomi. It consisted of a search engine, index, and
Microsoft Search Server to extract the text of the file for full text indexing as well. The handlers and iFilters MSS uses are the same as used by SharePoint, Microsoft SQL Server and Windows Search as well. The data sources that are to be indexed are identified by their URIs and have to be configured prior to indexing. The indexer updates the search index as soon as an item is indexed ("continuous propagation") so that the items can be queried against even before the indexing crawl is complete. MSS can also federate searches to other search services (including SharePoint and web search servers)