Web pages or materials which are in the form of hypermedia documents accessed through Internet can be located anywhere in world.

No matter from where they originated, most Web documents are created by using Hypertext Markup Language (HTML). HTML is a powerful authoring language and has different versions such as HTML 4.2, HTML 4.0, HTML 3.2, HTML 3.0 and HTML 2. HTML is used to define document format and structure, with the help of single tag or a pair of tags. A tag is like a string in the language surrounded by a less than (<) and a greater than (>) sign. An opening tag doesn't begin with a slash (/). An ending or closing tag is a string which begins with a slash (/). HTML documents format textual information with embedded markup tags which provide structure and style information. A whole document in HTML begins with <HTML> and ends with </HTML>.