If you are in the process-beginning, middle, or end-of automating your catalog, you will welcome the wealth of information in this concise, easy-to-use handbook. Created for librarians new to MARC and for those accustomed to using MARC data, it explains all three types of MARC records, and it gives considerations and specifications for MARC database processing, MARC products, and online systems. Byrne addresses MARC format integration in a separate chapter new to this edition and thoroughly explains the new and changed MARC codes that resulted from MARC format integration. In another new chapter she covers the MARC Format for Community Information. All information has been updated- including that on MARC authority records and holdings records.