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Richard Saul Wurman created an information empire by answering questions he wanted answered, and by organizing information the way people use it. Wurman says that information can be organized in five different ways, and each way is appropriate for different types of data, or different uses of data. He uses the acronym LATCH to describe the five ways.
http://ezinearticles.com/?Organizing-Information-the-Way-People-Use-It&id=113311