In today's library environment, the library's most important asset is its machine-readable database. In order to maintain this investment, Data Research Associates provides several comprehensive data conversion services, including retrospective conversion and authority control. For bibliographic records not yet in MARC (machine readable cataloging) format, Data Research offers network cataloging and batch processing services. Network cataloging allows the library to connect to the complete LCMARC database and overlay records manually. If the records contain a numeric search key they can be extracted and run against the LCMARC database for matching. Authority records allow the library to improve the accuracy and consistency of headings used in the bibliographic records. Authority records, most of which have been created and distributed by the Library of Congress, are available for names, uniform titles, series, and subjects. Data Research will take the library's bibliographic records and authorize the database, which will eliminate the variations found within headings that are identical from a content perspective but considered different by the computer. Once the library's database has been authority processed, Data Research can provide online authority verification to keep its file current. To assist with constructing an index, Data Research can also provide a Standard Indexing Table for Bibliographic and Authority Records. (KRN)