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More subtly , and perhaps more significantly , by moving many human activities ( shopping , entertainment , communication , and so forth ) onto the computer and computer networks , the Web makes it possible to track an individual 's activities more than ever before . Internet today provides a wealth of very interesting examples to answer the question that you are asking , and the reason for this is that there is a great deal of surreptitious data collection taking place by Websites , by firms that do advertising profiling , the so-called Web bugs that are related to HTML tags that make it possible to track and collect data about individuals without their knowledge . It would seem like an easy way to kill us all , except in dozens of places throughout the system we've installed detectors , and at any hint of toxins in the air , the system would close down and ducts would seal themselves in a hundred places , isolating the gas and making it easy to siphon out . And yet they will allow no one to obtain a hearing or to reply to charges against them , however humbly you plead with them , even though they would think it intolerable to be treated in that way themselves , by the Emperor or anyone else . This artificial laser guide star makes it possible to apply adaptive optics systems , that counteract the blurring effect of the atmosphere , almost anywhere in the sky . In that position he found it necessary to impose policies against the interests of the people who , he laments , do not see the necessity of making and accepting cuts in their living standards . However , in some applications such as Computer Supported Cooperative Work ( CSCW ) we have found it necessary to impose mutual exclusion on different groups of processes in accessing a resource , while allowing processes of the same group to share the resource . It will make it possible to track performance of individual teachers and their students .