The Internet is a network of millions of computers worldwide, connected together. It is an elaborate source of education, information, entertainment, and communication. Recently, President Bill Clinton expressed an idea to put the Internet into every classroom in America by the year 2000[4]. Considering the magnitude of this problem, and the costs involved, it is not realistically possible to set this as a goal. The Internet allows the almost five million computers [1] and countless users of the system to collaborate easily and quickly eith ....