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Introduction to HTML
HTML is the standard markup language for web content.
– It defines the structure and content of web pages.
HTML is often used in conjunction with CSS and JavaScript.
– Web browsers render HTML documents into multimedia web pages.
HTML elements are the building blocks of web pages.

HTML Elements
HTML elements are written using tags enclosed in angle brackets.
– Tags like and directly introduce content into the page.
– Other tags like


provide structural semantics for text.
– HTML tags are not displayed by browsers, but are used to interpret the content.
– HTML allows embedding programs written in scripting languages like JavaScript.

History of HTML
HTML was proposed by Tim Berners-Lee in 1989.
– The first publicly available description of HTML was in 1991.
HTML was influenced by SGML and early text formatting languages.
HTML was formally defined as an application of SGML by the IETF.
HTML 2.0 was the first HTML specification treated as a standard.

HTML Version Timeline
HTML 2.0 was published in November 1995.
HTML 3.2 was published as a W3C Recommendation in January 1997.
HTML 4.0 was published as a W3C Recommendation in December 1997.
HTML 4.01 was published as a W3C Recommendation in December 1999.
– HTML5 was completed and standardized in October 2014.

HTML5 Features
– HTML5 introduced new elements like for displaying video and audio.
– HTML5 includes support for JavaScript and CSS.
– HTML5 provides improved accessibility features.
– HTML5 supports offline storage and geolocation.
– HTML5 is designed to be compatible with older versions of HTML.

HTML (Wikipedia)

The HyperText Markup Language or HTML is the standard markup language for documents designed to be displayed in a web browser. It defines the content and structure of web content. It is often assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.

(HyperText Markup Language)
The official logo of the latest version, HTML5
Filename extension
  • .html
  • .htm
Internet media type
Type codeTEXT
Uniform Type Identifier (UTI)public.html
Developed by
Initial release1993; 31 years ago (1993)
Latest release
Type of formatDocument file format
Container forHTML elements
Contained byWeb browser
Extended fromSGML
Extended toXHTML
Open format?Yes

Web browsers receive HTML documents from a web server or from local storage and render the documents into multimedia web pages. HTML describes the structure of a web page semantically and originally included cues for its appearance.

HTML elements are the building blocks of HTML pages. With HTML constructs, images and other objects such as interactive forms may be embedded into the rendered page. HTML provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes, and other items. HTML elements are delineated by tags, written using angle brackets. Tags such as <img> and <input> directly introduce content into the page. Other tags such as <p> and </p> surround and provide information about document text and may include sub-element tags. Browsers do not display the HTML tags but use them to interpret the content of the page.

HTML can embed programs written in a scripting language such as JavaScript, which affects the behavior and content of web pages. The inclusion of CSS defines the look and layout of content. The World Wide Web Consortium (W3C), former maintainer of the HTML and current maintainer of the CSS standards, has encouraged the use of CSS over explicit presentational HTML since 1997. A form of HTML, known as HTML5, is used to display video and audio, primarily using the <canvas> element, together with JavaScript.

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