This presentation provides an overview of HTML and HTML5. It discusses the history and invention of HTML by Tim Berners-Lee in 1989. It describes the basic building blocks of HTML including elements, attributes, and data types. It then covers versions of HTML from 2.0 to 5 and new features in HTML5 like canvas, video, geolocation, app cache, and web workers. The presentation compares differences between HTML4 and HTML5 and provides examples of websites using HTML5.