Punching "customer loyalty program" into Microsoft Corp.'s search engine yields about 12 million hits. Now the company wants to add another one to the list -- its own Live Search service. The battle for search engine supremacy has traditionally centered on technology -- who has the largest index of Web pages, the most sophisticated query algorithms and can display relevant pages the fastest. Experts, however, say that although many of the same page listings that turn up on Yahoo Inc. and Google Inc.'s rival search engines can be found through Live Search, Microsoft still trails its rivals in search technology....
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