W$3($a$)$HTML and CSS HTML $($the Hypertext Markup Language$)$ and CSS $($Cascading Style Sheets$)$ are two of the core technologies for building Web pages. HTML provides the structure of the page, CSS the $($visual and aural$)$ layout, for a variety of devices. Along with graphics and scripting, HTML and CSS are the basis of building Web pages and Web Applications. Learn more below about: