Consider the story that was circulating during the early 1970s. It's probably been embellished in the retellings but it goes something like this. It seems that a couple of programmers at the city of Chicago's computer center began matching tape files from many of the city's different data processing applications on name and I.D. They discovered, for example, that several high paid city employers had unpaid parking fines. Bolstered by this revelation they pressed on. Soon they uncovered the names of several employees who were still listed on the register but who had not paid a variety of fees, a few of whom appeared in the files of the alcoholic and drug abuse program. When this finding was leaked to the public the city employees, of course were furious. They demanded to know who had authorized the investigation.