Although appropriate for all librarians, this primer is aimed at beginning librarians and students pursuing library science degrees, and covers 150 terms used in most libraries. The purpose of the primer is to encourage its readers to analyze their use of the defined business terms and to expose them to new and applicable terminology. The work resembles a glossary, but is considered a primer because it includes explanations and examples as well as definitions. Many of the terms have local variations and/or several meanings; therefore, readers are advised to be alert to variances in their own situations. Entries are cross-referenced as needed. Examples of terms include: appropriated funds, fiscal year, income types, inventory control, millage, requisition, variable expense, and work order. (SD)