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Apache has been the most popular web server on the Internet since April 1996.

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

Atom Syndication Format is an XML language used for web feeds very similar to RSS.

A family of web feed formats used to publish frequently updated content such as blog entries, news headlines or podcasts.

The website claims XHTML strict. XHTML Strict is the same as HTML 4.01 Strict but follows XML guidelines. See the link for more information.

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

JavaScript is a scripting language most often used for client-side web development. Its proper name is ECMAScript, though "JavaScript" is much more commonly used. The website uses JavaScript.

Creative Commons licenses provide a flexible range of protections and freedoms for authors, artists, and educators.

A persistent uniform resource locator (PURL) is a URL which describes an intermediate location which, when retrieved, results in redirection to the current location of the final resource. The site contains schema information identifying the use of PURL.

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.