Internet
the internet ,which links millions of computers through public and private telephone lines, is an open, world wide communication network. No one owns the internet, which consists of networks run by governments, universities, and commercial and voluntary organizations. There is an organization called the internet society that coordinates and sets of standards for the internet.

the internet grew out of a computer network which was developed by the us government in the late 1960s. In the next ten years it was extended to connect over 200 military and research establishment in the USA and other countries.
"Internetworking" , which was the term used at that time, proved itself to be very useful. Some Americans systems started similar systems that were used to help research projects.
An important part of the internet is email, which is used by millions of people all over the world. In fact, most people who own computers now use email more than the postal service.