Day1

 HTML

proposed and prototyped a system for CERN researchers to use and share documents. In 1989 he wrote a memo  proposing a hypertext system based on the Internet, and described the HTML language and wrote the server and browser software in the late 1990s.

The first public description of HTML was a document called HTML Markup, first mentioned on the web by Berners-Lee in late 1991. It describes 18 of the first elements that make up the HTML. The relatively simple design of HTML except for the hyperlink tag, these were strongly influenced by SGML QUID, SGML was founded as a document in the CERN home office. Eleven of these elements still exist in HTML.

Hypertext Markup Language (HTML) is a markup language that web browsers use to interpret and compose text, images, and other visual or audible material on web pages. The default properties of each HTML item are defined and described in the browser, and these properties can be changed or enhanced by the web page designer using additional SGML. Many text elements were found in the 1988 ISO Technical Report (TR 9537) using SGML, which in turn covers features of early text formatting languages ​​such as those used by the runoff command developed in the early 1960s for the CTSS (Compatible Time Sharing System) operating system: these formatting commands were derived from commands used by assembly workers to format documents manually. However, SGML's concept of generalized markup is based on elements (nested ranges with annotated attributes) rather than just print effects, with the separation of structure and markup, and HTML has gradually moved in this direction with CSS. Berners-Lee considered the HTML implementation of SGML to be formally defined as such by the Internet Engineering Task Force (IETF) with the mid-1993 publication of the first proposal for an HTML specification: the "Hypertext Markup Language (HTML)" Internet project by Berners-Lee and Dan Connolly, which included the SGML document type definition for the syntax definition