National Center for Supercomputing Applications
A Beginner's Guide to HTML

Acronym Expansion

WWW 
   World Wide Web (or Web, for short). 
SGML 
   Standard Generalized Markup Language -- this is a standard for describing markup languages. 
DTD 
   Document Type Definition -- this is a specific markup language, written using SGML. 
HTML 
   HyperText Markup Language -- HTML is a SGML DTD. In practical terms, HTML is a collection of styles (indicated by markup tags) that define the various components of a World Wide Web document. 

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