XHTML (eXtensible HyperText Markup Language)

A markup language used to describe the structure of our web pages.

CSS (Cascading Style Sheets)

A language for styling our web pages.

JavaScript

A language for client-side interactivity.

PHP (PHP: HyperText Preprocessor)

A language for server-side preprocessing.

MySQL

An RDBMS (Relational DataBase Management System).