An overview of pervasive computing

he importance of pervasive computing is rapidlyincreasingwith the current trend toward universal presence of mobile computing, computer networks, and wireless communications ineveryday life. In thelastdecade, there has been a dramatic increase in the use of companion devices and embedded computing devices. For example, wirelessly connectcd organizers and smart phones are becoming popular, and digital computing in some form is now an integral part of numerous evcryday appliances. This has led to a change in thc waywe perceive computing andcomputers. Computers are no longer standalone special-purpose machines to beusedbyexperts; rather, they arc ubiquitously present in a networked environment to scrve myriad needs of everyday life. The change in our perception of computing and computing devices, and their ever increasing presence in our everyday life is the subject of the new ficld known as pervasive computing. The word pervasive