Web applications are web pages that function as application software. The information on the Web is transferred across the Internet using HTTP. Multiple web resources with a common theme and usually a common domain name make up a website.
World Wide Web, the leading information retrieval service of the Internet (the worldwide computer network). The Web gives users access to a vast array of content that is connected by means of hyperlinks, electronic connections that link related pieces of information.
The web is a part of the internet, even though people often use the two terms interchangeably. It was invented in 1989 by Sir Tim Berners-Lee, who was a computer scientist at the European Organization for Nuclear Research.