Bing is a limited start, but for a reasonable set of queries, it is better,” says Dan Weld, a computer scientist and search researcher at the University of Washington. “Will that cause them to gain market share? That’s a much harder question to answer.”

For most searches, Bing comes across as a competent but weaker version of Google. A search for “photovoltaics,” for example, produces much the same list of links to Wikipedia and government sites as Google, although Google

also offers a book about the subject. A search for “Zurich tours” offers the same list of websites as Google, but Google also offers a map of Zurich with links to different tour operators. For many other searches, the results are barely distinguishable. Thiswebsite provides a way to compare Bing and Google search results side by side.

Bing does, however, deploy some interesting tricks in a few key areas. Its most obvious distinction is the way that it attempts–subtly, for the most part–to act as an intelligent intermediary for shopping, travel reservations, health advice, and local information.

Clicking the Bing shopping channel provides product listings and links to reviews, as with Google’s shopping channel. But Bing also provides a tool on the left-hand side of the page that provides insight into the contentof reviews. Reviews from sites including Epinion and Amazon are analyzed using a natural-language engine developed at Microsoft Research.