HTML stands for HyperText Markup Language. Pages on the World Wide Web are marked-up in HTML. Similar to CSV files, HTML files are stored in plain text format and can be edited using plain text editors like notepad. On the server, a HTML file usually has a .html extension, although this is not strictly required, for instance .htm extensions are also common, this comes from the days when all extensions were three letters long.
Relation to other markup languages
HTML itself came from SGML (Standard Generalised Markup Language) as it is a version of SGML, using the standard SGML syntax. XML (Extensible Markup Language) is also a version of SGML and when HTML comes together with XML, we have XHTML – an XML compatible version of HTML (or an HTML compatible version of XML).
Invention of HTML
HTML was invented by Tim Berners-Lee, founder of the World Wide Web Consortium (w3c) which still formalises the standards for HTML and related technologies like CSS to this day, with the help of its member organisations like Google and Microsoft.
Who should learn HTML