The ABC's of SGML/HTML: Understanding the Concept of CALS and SGML
http://www.stc.org/confproceed/1996/PDFs/PG399401.PDF

Perry, Lynn A.
STC Proceedings
1996

Abstract:

Many technical communicators have heard about Computer-aided Acquisition and Logistic Support (CALS), or Standard Generalized Markup Language (SGML), but some do not understand the concept. This paper introduces CALS, the relationship between CALS and SGML, the structure of SGML, and how SGML affects technical communicators.