Since the early days of the web development, there have been many versions of HTML: As-
HTML or HTML 1.0 (1991)-
HTML 1.0 was the first release of HTML to the world and written by Tim Berners-Lee.
HTML 2.0 (1995)-
HTML 2.0 was an expansion of the HTML language (HTML 1.0). HTML 2.0 was created to be a Web standard Even though the original version of HTML was never referred to as HTML 1.0.
HTML 3.2 (1997)-
HTML 3.0 was proposed a set of standards, released in 1995, after HTML 2.0. It would have added new features, including the ability to code tables, display mathematical equations, and allowing text flow around other objects, etc.
However, it was also designed to be backwards compatible with HTML version 2.0. HTML version 3.0 was superseded by HTML 3.2 in 1997. It was the first version of HTML to be released as a W3C (World Wide Web Consortium) recommendation and implemented most of the features that were proposed in HTML 3.0.
HTML 4.01 (1999)-
HTML 4.0/4.1 was developed on the framework of HTML 3.2 and introduces several new and drastic elements that were not implemented in previous versions. Such new elements are- style sheets, scripting, frames, embedded objects, improved support for internationalization, richer tables, and enhancements to forms, etc. HTML 4 becomes a standard in April, 1998. Its updated version HTML 4.1 was published in December, 1999.
XHTML (2000)-
XHTML was a rewrite of HTML as an XML (eXtensible Markup Language). XML is a standard markup language that is used to create other markup languages. XML content can easily be shared across applications. This feature of the language makes XML potentially very powerful.
HTML5 (2014)-
HTML5 is the latest version of HTML to be standardized by the W3C. WHATWG (Web Hypertext Application Technology Working Group) began working group decided to develop HTML as a "Living Standard". A living standard is always updated and improved where new features can be added, but old functionality cannot be removed. The HTML5 was developed through collaborative efforts by W3C and WHATWG.
Initially, HTML was limited to static documents and accessed primarily by computers, but in recent years that HTML 4.0 was demanding by users to behave as “dynamic pages”. The dynamic pages behave more like applications than static documents, to use the web on different devices and platforms with high quality audio and video. The goals of HTML 5 is to replace proprietary media plug ins with open standards that allows web applications to behave like live and interactive applications.
The latest versions of browsers (such- Apple Safari, Google Chrome, Mozilla Firefox, Internet Explorer 9.0, Opera, etc.) all support many HTML5. The mobile web browsers that come pre-installed on iPhones, iPads, and Android phones all are also have an excellent support for HTML5.