The usap.gov website
The historic World Wide Web logo, designed by Robert Cailliau.
The nasa.gov home page in 2015
A web page displayed in a web browser
Server-side programming language usage in 2016.
A global map of the Web Index for countries in 2014
This NeXT Computer was used by Sir Tim Berners-Lee at CERN and became the world's first Web server.
The World Wide Web functions as an application layer protocol that is run "on top of" (figuratively) the Internet, helping to make it more functional. The advent of the Mosaic web browser helped to make the web much more usable, to include the display of images and moving images (GIFs).
Graphic representation of a minute fraction of the WWW, demonstrating hyperlinks
A screenshot of a web page on Wikimedia Commons
Dynamic web page: example of server-side scripting (PHP and MySQL)
The usap.gov website
The inside and front of a Dell PowerEdge web server, a computer designed for rack mounting
Multiple web servers may be used for a high traffic website; here, Dell servers are installed together to be used for the Wikimedia Foundation.
The results of a search for the term "lunar eclipse" in a web-based image search engine

All publicly accessible websites collectively constitute the World Wide Web.

- Website

Multiple web resources with a common theme and usually a common domain name make up a website.

- World Wide Web
The usap.gov website

9 related topics

Alpha

The home page of a website displayed in a web browser

Web page

The home page of a website displayed in a web browser

A web page (or webpage) is a hypertext document on the World Wide Web.

A website consists of many web pages linked together under a common domain name.

Traditional browser arrangement: UI features above page content

Web browser

Traditional browser arrangement: UI features above page content
Nicola Pellow and Tim Berners-Lee in 1992
Marc Andreessen, lead developer of Mosaic and Navigator, in 2007

A web browser (also referred to as an Internet browser or simply a browser) is application software for accessing the World Wide Web or a local website.

When a user requests a web page from a particular website, the web browser retrieves the necessary content from a web server and then displays the page on the user's device.

Hypertext Transfer Protocol

Application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems.

Application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems.

URL beginning with the HTTP scheme and the WWW domain name label
Tim Berners-Lee
An HTTP/1.1 request made using telnet. The request message, response header section, and response body are highlighted.

HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser.

A web browser, for example, may be the client whereas a process, named web server, running on a computer hosting one or more websites may be the server.

The hierarchical domain name system, organized into zones, each served by domain name servers.

Domain name

String that identifies a realm of administrative autonomy, authority or control within the Internet.

String that identifies a realm of administrative autonomy, authority or control within the Internet.

The hierarchical domain name system, organized into zones, each served by domain name servers.
350px
absolutepoker.com
channelsurfing.net
libertyreserve.com

Domain names are often used to identify services provided through the Internet, such as websites and email services.

Therefore, ftp.example.com might be an FTP server, www.example.com would be a World Wide Web server, and mail.example.com could be an email server, each intended to perform only the implied function.

JavaScript

JavaScript, often abbreviated JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS.

As of 2022, 98% of websites use JavaScript on the client side for web page behavior, often incorporating third-party libraries.

An example of a hyperlink as commonly seen in a web browser, with a mouse pointer hovering above it

Hyperlink

Reference to data that the user can follow by clicking or tapping.

Reference to data that the user can follow by clicking or tapping.

An example of a hyperlink as commonly seen in a web browser, with a mouse pointer hovering above it
Several documents being connected by hyperlinks
How internal MediaWiki links work when one wants to create a link that displays words different from the linked page's title.
Douglas Engelbart and his team at SRI, 1969

The effect of following a hyperlink may vary with the hypertext system and may sometimes depend on the link itself; for instance, on the World Wide Web most hyperlinks cause the target document to replace the document being displayed, but some are marked to cause the target document to open in a new window (or, perhaps, in a new tab).

Somewhat controversially, Vuestar Technologies has tried to enforce patents applied for by its owner, Ronald Neville Langford, around the world relating to search techniques using hyperlinked images to other websites or web pages.

HTTP cookies share their name with a popular baked treat.

HTTP cookie

HTTP cookies share their name with a popular baked treat.
A possible interaction between a web browser and a web server holding a web page in which the server sends a cookie to the browser and the browser sends it back when requesting another page.
In this fictional example, an advertising company has placed banners in two websites. By hosting the banner images on its servers and using third-party cookies, the advertising company is able to track the browsing of users across these two sites.
A cookie can be stolen by another computer that is allowed reading from the network
Cross-site scripting: a cookie that should be only exchanged between a server and a client is sent to another party.

HTTP cookies (also called web cookies, Internet cookies, browser cookies, or simply cookies) are small blocks of data created by a web server while a user is browsing a website and placed on the user's computer or other device by the user's web browser.

Cookies serve useful and sometimes essential functions on the web.

Google Search homepage as of March 2020

Google Search

Search engine provided by Google.

Search engine provided by Google.

Google Search homepage as of March 2020
Google Search homepage as of March 2020
A definition link is provided for many search terms.
A screenshot of the Google Videos homepage in 2016.
A screenshot of the Google Videos homepage in 2016.
A screenshot of suggestions by Google Search when "wikip" is typed
Product Sans, Google's typeface since 2015
A screenshot of the error of January 31, 2009.

For websites that are currently down or otherwise not available, Google provides links to cached versions of the site, formed by the search engine's latest indexing of that page.

Google Videos allows searching the World Wide Web for video clips.

An SQL select statement and its result

Database

Organized collection of data stored and accessed electronically.

Organized collection of data stored and accessed electronically.

An SQL select statement and its result
Basic structure of navigational CODASYL database model
In the relational model, records are "linked" using virtual keys not stored in the database but defined as needed between the data contained in the records.
Collage of five types of database models
Traditional view of data

Examples include computerized library systems, flight reservation systems, computerized parts inventory systems, and many content management systems that store websites as collections of webpages in a database.

In a hypertext or hypermedia database, any word or a piece of text representing an object, e.g., another piece of text, an article, a picture, or a film, can be hyperlinked to that object. Hypertext databases are particularly useful for organizing large amounts of disparate information. For example, they are useful for organizing online encyclopedias, where users can conveniently jump around the text. The World Wide Web is thus a large distributed hypertext database.