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Wikipedia: Standard Generalized Markup Language

Anchor text: The Roots of SGML -- A Personal Recollection

Wikipedia: IBM 1130

Anchor text: A Brief History of the Development of SMDL and HyTime

Wikipedia: HyTime

Anchor text: Charles F. Goldfarb's SGML Homepage

Wikipedia: Charles Goldfarb

Anchor text: The Roots of SGML - A Personal Recollection

Wikipedia: IBM Generalized Markup Language

Anchor text: The Roots of SGML - A Personal Recollection

Wikipedia: SCRIPT (markup)

Wikipedia: Document Content Architecture