A bookmark is a saved link to a Web page that has been added to a list of saved links. When you are looking at a particular Web site or home page and want to be able to quickly get back to it later, you can create a bookmark for it. You can think of your browser as a book full of (millions of ) Web pages and a few well-placed bookmarks that you have chosen. The list that contains your bookmarks is the "bookmark list".

Social Bookmarking

Social bookmarking is a user-defined taxonomy system for bookmarks. Such a taxonomy is sometimes called a folksonomy and the bookmarks are referred to as tags. Unlike storing bookmarks in a folder on your computer, tagged pages are stored on the Web and can be accessed from any computer. Technorati, a blogging site, describes the system as "The real-time Web, organized by you." Web sites dedicated to social bookmarking, such as Flickr and del.icio.us, provide users with a place to store, categorize, annotate and share favorite Web pages and files.

Book marklet

A  direct link to a specific function or feature within a Web page. While a browser bookmark takes you to a specific page, the bookmarklet will take you to a function, such as a specific search (including the search phrase) on a Web page, a tagged location on Google maps and others. Bookmarklets are possible due to browser support of the protocol "javascript:" that lets you execute bits of JavaScript code directly.

Cool URI

The term used to describe a Uniform Resource Identifier (URI) that does not change. This enables resources that have been linked to, bookmarked, or referenced in other ways to remain valid links for many years to come. A cool URI is considered to be a foundation requirement for the Semantic Web.