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Access control is often a system enabling authorities to regulate use of areas and resources in a given physical facility or computer-based information system. Access control is, in fact, a typical, everyday phenomenon. For example, a lock on the car door is basically a type of access control. The PIN on a bank's ATM system is another form of access control. Even nightclub bouncers, browsing front of the door, are another demonstration of (perhaps) a more primitive mode of access control. Using an access control mechanism is very important when persons aim to secure confidential, important, or sensitive information and equipment.
Signs of birth. Since the middle of the 20th century, technology has grown faster and faster. It was only six and a half years since the discovery of uranium fission in January 1939 to the first atomic bomb exploded in July 1945. The emergence of electronic computers has led to more profound changes in the fields of human social life. These technological breakthroughs can be called technological revolutions
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