From ArticleWorld

The term Internet stands for a broad network of computers which are interconnected and facilitate data transmission using a standard form of protocols such as TCP-IP.

The Internet, is a system which is publicly accessible worldwide. It can be accessed and used for a variety of purposes such as, transmission of data in various forms one of which being the popular electronic mail or e-mail, online chat, research. One of the main features of the Internet is the world wide web well known as the term WWW. The pages on the world wide web containing data and information on various subjects are known as web pages and a single page or many pages make up a website.

See also this WEB 2.0 tool