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Consider the average-knowledge worker at a midsize company. When he is hired, he gets a computer with a set of applications and a big, empty hard drive. Then he starts creating data, exchanging data, downloading data and transferring data. Maybe he works on a project and completes it, but the data from that project stays on the computer. Or, maybe he transfers departments and takes his computer with him. He also will probably use DVDs, thumb drives, cloud services and social media websites to store information.