The Internet, the World Wide Web, and the concept of service delivery have revolutionized the way commercial, academic, governmental, and nongovernmental organizations deal with their supplies and their clients and customers. Individuals and organizations are overwhelmed with data produced by IT systems that are so pervasive throughout society, government, and business. The wide variety and huge numbers of data sources including sensors, cell phones, tablets, and other devices is increasing at a seemingly exponential rate. Estimates (2010) were that all sources of data, including replicated data such as retweets and resends of e-mail, amount to tens of exabytes per month—that is 1018 or 1,000,000,000,000,000,000 bytes. ...

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