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National Agricultural Library TELNET opac.nal.usda.gov login: isis OPAC = VTLS To exit, type /QUIT WHAT IS ISIS? ISIS (Integrated System for Information Services) is a computerized catalog containing the MOST CURRENT bibliographic citations for books, reports, maps, journals/periodicals, audiovisuals, CD-ROMs, software, and other materials added to the National Agricultural Library (NAL) collections. For materials published prior to 1966, consult the card catalog if not found in ISIS. ISIS also serves as an agricultural union catalog that includes bibliographic citations for materials of the U.S. National Arboretum Library and the five USDA, Agricultural Research Service (ARS) Regional Libraries: Eastern Regional Research Center, National Center for Agricultural Utilization Research, Russell Research Center, Southern Regional Research Center,and Western Regional Research Center. Records from cooperating libraries are added on an ongoing basis. THEIR PUBLICATIONS MAY OR MAY NOT BE IN THE NAL COLLECTION.