Search technology that can gauge opinion and predict the future

Inspired by a system for categorizing books proposed by an Indian librarian more than 50 years ago, researchers have developed a new kind of internet search that takes into account factors such as opinion, bias, context, time and location. The new technology, which could soon be in use commercially, can display trends in public opinion about a topic, company or person over time - and it can even be used to predict the future.

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