The History of HTML
HTML stands for HyperText Markup Language and is used to create Web pages
 
After Vannevar Bush first proposed the basics of hypertext in 1945, it laid the foundation for Tim Berners-Lee and others to invent the World Wide Web, HTML (hypertext markup language), HTTP (HyperText Transfer Protocol) and URLs (Universal Resource Locators) in 1990.
Definition of HTML
HTML stands for HyperText Markup Language, it is the authoring language used to create documents on the World Wide Web. HTML is used to define the structure and layout of a Web page, how a page looks and any special functions. HTML does this by using what are called tags that have attributes. For example means a paragraph break. As the viewer of a web page you don't see the HTML, it is hidden from your view, however, you do the results.

Tim Berners-Lee & HTML
Tim Berners-Lee was the primary author of html, assisted by his colleagues at CERN, an international scientific organization based in Geneva, Switzerland. Tim Berners-Lee is currently the Director of the World Wide Web Consortium, the group that sets technical standards for the Web.
View a screen shot of Tim Berners-Lee's Browser Editor as developed in 1991-92 This was a true browser editor for the first version of HTML and ran on a NeXt workstation. Implemented in Objective-C, it, made it easy to create, view and edit web documents. Hypertext Markup Language (First Version of HTML) was formally published on June 1993.