b'Prefaceadding form and geographic subdivisions from the Dewey tables. Only a few examples of builtnumbers are given in Sears, such as 940.53022 for World War, 1939-1945Pictorial works. Nolibrary should feel the need to extend classification numbers beyond what is practical for the size ofthe librarys collection. For a discussion of close and broad classification and for instructions onbuilding numbers from the Dewey tables, the cataloger should consult the introduction to the mostrecent edition of the Abridged Dewey Decimal Classification and Relative Index.Style, Filing, Etc.For spelling and definitions the editor has relied upon Websters Third New International Dictionaryof the English Language, Unabridged (1961) and the Random House Websters UnabridgedDictionary, 2nd ed., revised and updated (1997). Capitalization and the forms of corporate andgeographic names used as examples are based on the Anglo-American Cataloguing Rules, 2nd ed.,2002 revision, and have been updated to be RDA compliant. The filing of entries is alphabetical bymain heading, with subheadings following, also alphabetically. This is a change from the filing ofthe twentieth edition, but catalogers should note that they are not obligated to change the order usedin their library. Corporate name headings for corporate entities within other entities, such as UnitedStates, Army, are interfiled with the subdivisions for the main corporate heading.Every term in the List that may be used as a subject heading is printed in boldface type whether it isa main term; a term in a Use reference; a broader, narrower, or related term; or an example in ascope note or general reference. If a term is not printed in boldface type, it is not used as a heading.A-10'