Data :
Data are raw facts and figures that can be processed or stored by a computer. For example, text, numbers , symbols, etc.
Information :
Information is data that has been processed into a form that gives it meaning. For example, analysis of retails of sale data can provide information on which products are selling.
Knowledge :
Knowledge is the understanding of rules needed to interpret information. For example, information on retail market sales can be analyzed with promotional efforts to yield knowledge of customer behavior .
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