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Chris Sherman, president of Searchwise, said Google, Yahoo, Microsoft's Bing, and newcomer WolframAlpha are the four main search engines that benefit researchers.

Social media, I think it's a fad. I think it will not have lasting value as a search medium. I think that there's a lot of focus on searching Facebook and searching Twitter and things like that. I just don't see it. I see lots and lots of problems with that," he said.

Social media, I think it's a fad. I think it will not have lasting value as a search medium. I think that there's a lot of focus on searching Facebook and searching Twitter and things like that. I just don't see it. I see lots and lots of problems with that," he said.