Web browser (or browser)
A software application used to locate and display webpages. The two most common browsers are Netscape Navigator and Microsoft Internet Explorer.

Web portal
Web sites that offer a wide variety of services such as emails, forums, search engines, and online shopping facilities.

Web server
A computer that delivers (or serves up). Every web server has an IP and possibly a domain name. For example, entering the URL http://www.domina.com/index.html in a browser will send a request to the server whose domain name is pcwebopedia.com. The server then retrieves the page named index.html (or for example a page in the shopping carts) and sends it to the browser.

Webcast
Broadcasting information via the Internet, particularly on the World Wide Web.

Webcasting
This involves using the Internet, and in particular the World Wide Web, to broadcast information by transmitting encoded video to multiple users who can receive the same contents at the same time.

Webpage
A document on the World Wide Web. A URL identifies every webpage.

Website (or site)
A location on the World Wide Web. Each website contains a home page, which is usually the first page users see when they enter the site. The home page sets out the main directory to other parts of the site.

Website host
A commercial web server holding a customer's webpage or website. Many ISPs will host a personal webpage at no additional cost above the monthly service fee. Multi-page commercial websites software are hosted at differing prices. Typically, the customer's registered domain name is used.

Wireless Access Protocol (WAP)
A secure protocol allowing users to access information instantly via handheld wireless devices such as mobile phones, pagers, two-way radios and PDAs.

World Wide Web (www or Web)
A system of Internet servers supporting specially formatted documents. Documents are formatted using a common language called HTML (Hyper Text Markup Language) that supports links to other documents, as well as graphics, audio, and video files. This means people can browse other servers and look at other documents formatted in the common language very easily. Not all internet servers support www.