Bing is a web search engine owned and operated by Microsoft. The service has its origins in Microsoft's previous search engines: MSN Search, Windows Live Search and later Live Search. Bing provides a variety of search services, including web, video, image and map search products. It uses the ASP.NET programming language and follows the design principles of Microsoft's "Metro" design language. As of November 2015, Bing is the second largest search engine in the US with a query volume of 20.9%, behind Google on 63.9%. Yahoo! Search, which Bing largely powers, has 12.5%.