HTML 5 represents the biggest leap forward in web standards in almost a decade. Unlike the specifications that came before it, HTML 5 is not merely intended to present content to a web browser. Its goal is to bring the web into maturity as a full-fledged application platform — a level playing field where video, sound, images, animations, and full interactivity with your computer are all standardized. And it may be a long way off still, but elements of HTML 5 are already reshaping the way we use the web.How HTML 5 Is Already Changing the Web - Webmonkey
The last update to the Hypertext Markup Language — the lingua franca of the web — was the 4.01 specification completed in September, 1999.
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