In web development, 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 and XHTML, but the language can be applied to any kind of XML document, including SVG and XUL.



A web developer is a software developer or software engineer who is specifically engaged in the development of World Wide Web applications, or distributed network applications that are run over the HTTP protocol using an HTTP server, a web server, and an HTTP client, a web browser. Web developers can be webmasters who handle website administration and web design as well as web application development or can simply be web application developers.