The book is for undergraduate computer science and information technology students. The book can also be used by professionals as reference book. The book does not require any prerequisite knowledge of any computer language. The book covers HTML and wherever required refers to HTML5. HTML5 is going to remain de facto standard for World Wide Web (WWW) at least till 2022. Next set of topics covered are JavaScript, XML, PHP and MYSQL. PHP provides some flavour of server side programming and thus introduces reader to the concept of static and dynamic web applications.HTML Document Tree and also DOM concept has been introduced. The book should generate happy reading experience for the reader.