Text for the question.
The Internet, sometimes called simply "the Net, " is a worldwide system of computer networks - a network of networks in which users at any computer can, if they have permission, get information from any other computer and sometimes talk directly to users at other computers. Today, the Internet is a public, cooperative, and self-sustaining facility accessible to hundreds of millions of people worldwide. For many Internet users, electronic mail (e-mail) has practically replaced the Postal Service for short written transactions. Electronic mail is the most widely used application on the Net and the most widely used part of the Internet is the World Wide Web (often abbreviated "www" or called "the Web"). You have access to millions of pages of information while using the Web.
Which part of the Internet is described as the most widely used?
