HTML5
HTML - HyperText Markup Language
HTML5
HTML5 is a markup language used for structuring and presenting content for the World Wide Web and a core technology of the Internet.

Different types of HTML:

Created in 1990

November 1995
- HTML 2.0

January 1997
- HTML 3.2

December 1997
- HTML 4.0

April 1998
- HTML 4.0 (reissued)

December 1999
- HTML 4.01

May 2000
- XHTML

Beginning 2014
- HTML 5
(2014 HTML5 will be the standard and compatible with all major Search Engines)
Reference
Wikipedia
Common Web Languages
CSS
CSS3
HTML
HTML5