HTML - Wikipedia
https://en.wikipedia.org/wiki/HTML
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets...
Introduction to HTML
https://www.w3schools.com/html/html_intro.asp
What is HTML? HTML stands for Hyper Text Markup Language. HTML is the standard markup language for creating Web pages. HTML describes the structure of a Web page. HTML consists of a series of elements.
HTML For Beginners The Easy Way: Start Learning HTML & CSS...
https://html.com/
Learn how to code HTML & CSS for free at HTML.com. We've HTML tutorials & reference guides on tags, attributes and everything else you need to master HTML. Learn HTML Code, Tags & CSS.