List three application of the internet?

The World Wide Web is the combination of four basic ideas:

• Hypertext: a format of information which allows, in a computer environment, one to move from one part of a document to another or from one document to another through internal connections among these documents.
• Resource Identifiers: unique identifiers used to locate a particular resource (computer file, document or other resource) on the network - this is commonly known as a URL or URI, although the two have subtle technical differences.
• The Client-server model of computing: a system in which client software or a client computer makes requests of server software or a server computer that provides the client with resources or services, such as data or files.
• Markup language: characters or codes embedded in text which indicate structure, semantic meaning, or advice on presentation.