What is Internet?
 The Internet, sometimes called simply "the Net," is a worldwide system 
of computer networks - a network of networks in which users at any one 
computer can, if they have permission, get information from any other 
computer (and sometimes talk directly to users at other computers). It 
was conceived by the Advanced Research Projects Agency (ARPA) of the 
U.S. government in 1969 and was first known as the ARPANnet
  The Internet, sometimes called simply "the Net," is a worldwide system 
of computer networks - a network of networks in which users at any one 
computer can, if they have permission, get information from any other 
computer (and sometimes talk directly to users at other computers). It 
was conceived by the Advanced Research Projects Agency (ARPA) of the 
U.S. government in 1969 and was first known as the ARPANnet. The original aim was to create a network that would allow users of a 
research computer at one university to "talk to" research computers at 
other universities. A side benefit of ARPANet's design was that, because
 messages could be routed or rerouted in more than one direction, the 
network could continue to function even if parts of it were destroyed in
 the event of a military attack or other disaster. Every one can have a computer an internet, so its a daangerous thing to log in on some places.