-- See Also Abbreviations Here are entered general works on abbreviations and/or general lists of abbreviations of words and phrases. Works containing lists of abbreviations pertaining to a topic are entered under headings of the type [topic]--Abbreviations. Works containing lists of abbreviations pertaining to a topic in a language other than English are assigned two headings: 1. [topic]--Abbreviations. 2. Abbreviations, [name of language]. --subdivision Abbreviations under subjects, e.g. Associations, institutions, etc.--Abbreviations; Law--Abbreviations
--subdivision Heraldry under topical headings, types of industries, and names of individual corporate bodies for the devising, granting, or use of armorial insignia, e.g. Book industries and trade--Heraldry; Popes--Heraldry
--subdivision Communication systems under names of individual military services, e.g. United States. Army--Communication systems; and subdivision Communications under individual wars, e.g. World War, 1939-1945--Communications