Controlled Vocabulary a specialized set of terms used to index records in a database. Terms are cross referenced providing references from terms not used to the correct thesaurus terms. Periodicals publications which are issued at least twice a year, including journals, magazines and newspapers. Periodical Indexes and Abstracts periodical indexes list articles which have appeared in journals, magazines or newspapers. They list author, title, name of periodical, volume pages and date of publication.
Abstracts are indexes that also contain summaries of the content of the article.
Both indexes and abstracts are found in reference departments. They may be in print or electronic form. Subject Heading words or phrases assigned to books and articles and used to index these items by topic. A common authority for subject headings is the Library of Congress Subject Headings, a publication which is contantly updated. Stacks the bookshelves located throughout the library, where most library materials are stored.