Editing Dewey Decimal Classification (section)

=== Treatment of homosexuality ===
In 1932, topics relating to [[homosexuality]] were first added to the system under 132 ([[Mental disorder|mental derangements]]) and 159.9 ([[abnormal psychology]]). In 1952, homosexuality was also included under 301.424 (the study of [[sexes]] in society). In 1989, it was added to 363.49 ([[social problems]]), a classification that continues in the current edition.<ref name="Sullivan">{{cite web|last1=Sullivan|first1=Doreen|title=A brief history of homophobia in Dewey decimal classification|date=July 23, 2015 |url=https://overland.org.au/2015/07/a-brief-history-of-homophobia-in-dewey-decimal-classification/|publisher=Overland|access-date=19 December 2017|archive-date=December 22, 2017|archive-url=https://web.archive.org/web/20171222105254/https://overland.org.au/2015/07/a-brief-history-of-homophobia-in-dewey-decimal-classification/|url-status=live}}</ref>{{As of when|date=November 2023}}

In 1996, homosexuality was added to 306.7 ([[sexual relations]]); this remains the preferred location in the current edition. Although books can also be found under 616.8583 (sexual practices viewed as medical disorders), the official direction states:<ref  name="Sullivan"/>
{{blockquote
|text=Use 616.8583 for homosexuality only when the work treats homosexuality as a medical disorder, or focuses on arguing against the views of those who consider homosexuality to be a medical disorder.
}}