Australia

• National Library of Australia, Catalogue

Austria

• Online-Kataloge des Österreichischen Verbundkataloges:
  • Collective Search
  • Periodicals
  • Participating Libraries
• Österreichische Nationalbibliothek, Kataloge

Belgium

• ANET Antwerpen Library Network: Collective catalogue of the University of Antwerp, City of Antwerp, and others; gives also access to Antilope, the union catalogue of the periodicals held by the Royal Library and other Belgian libraries.
• Koninklijke Bibliotheek van België / Bibliothèque Royale Albert I (Bruxelles), includes Bibliographie de Belgique 1875-1974
• Université libre de Bruxelles: Libraries - OPAC
• LIBIS LIBIS-Network: library network including the Catholic Universities of Brussels and Leuven and the Academia Belgica in Rome

Canada

• University of Toronto libraries

France

• BNF Bibliothèque Nationale de France: Catalogues
• SUDOC Système universitaire de documentation, OPAC
• SIBIL Association Réseau SIBIL - France (27 university libraries): accàs catalogue
• Réseau Documentaire Informatisé de Strasbourg - Catalogue collectif
• CIBLE Catalogue Interconnecté de Bibliothèques à Lyen et en Europe: Interrogation
• CNRS Département des Sciences de l'Homme et de la Société -- Catalogues Collectifs des Ouvrages (CCO)
  • Base Premier Millénaire Chrétien

Germany    [nationwide] [regional corporate systems] [Berlin]

Germany: nationwide search

• DBI (Ehemaliges) Deutsches Bibliotheksinstitut, DBI-Link Datenbanken: Login. The DBI is in the process of being dissolved by law of 6 Oct 1999.
• DDB Die Deutsche Bibliothek, DDB - Z39.50 Gateway (Java required). Includes, for simultaneous or separate access:
  • German systems: DBI, DDB-ILTIS (the main DDB database, monographs and periodicals published in Germany or in German speaking countries 1945 to date), GBV, BVB, DIMDI (Deutsches Institut für Medizinische Dokumentation und Information)
  • European OPACs: British Library, British COPAC, BIBSYS (Norway), LIBRIS (Sweden), LBOPAC (Steiermärkische Landesbibliothek)
  • Non-European OPACs: Library of Congress, MELVYL (University of California, USA), Center for Research Libraries (Chicago), National Library of Australia, Chinese Library at the University of Hong Kong
• DigBib Digitale Bibliothek NRW: Metasearch engine, includes various German catalogues (DDB-ILTIS, BVB, GBV, HBZ), catalogues in other countries (British Library, Library of Congress, MELVYL), and other databases
• EUCOR Europäische Konföderation der Oberrheinischen Universitäten / Confédération Européenne des Universités du Rhin Supérieur: Meta search interface located at Karlsruhe, includes Badische Landesbibliothek and university libraries Karlsruhe, Freiburg, Basel & Bern, Mulhouse and Strasbourg
• KVK Karlsruher Virtueller Katalog, Meta search interface, includes:
  • German catalogues: DDB (ILTIS), German regional systems (BVB, GBV, HBZ, HEBIS, HOBSY (Hannover), KOBV quicksearch, SWB), ZDB (Zeitschriftendatenbank)
  • Catalogues in Austria & Switzerland: Österreichischer Verbundkatalog, IDS (Deutschschweiz), NEBIS (Zürich)
  • Other countries: BNF (Paris), British COPAC, British Library, NLS (Scotland), Indice SBN (Italy), Biblioteca Nacional (Spain), Library of Congress
  • Commercial Booksellers: VLB (Verzeichnis lieferbarer Bücher), KNO (German wholesaler), Amazon.de
• VD17 Verzeichnis der im deutschen Sprachraum erschienenen Drucke des 17. Jahrhunderts, catalogue, ca. 147.000 entries (a retrospective national bibliography of 17th century prints, upgraded quarterly)

Germany: regional corporate systems

• BVB Bibliotheksverbund Bayern, Verbundkatalog. Collective catalogue for all Bavarian libraries, including Bayerische Staatsbibliothek München, Staatsbibliothek Bamberg, university libraries of Augsburg, Bamberg, Bayreuth, Eichstätt, Erlangen-Nürnberg, München (UB/TU), Passau, Regensburg, Würzburg. Additional search access to SWB, GBV, ZDB, DDB, and DBI
• BVBB Bibliotheksverbund Berlin-Brandenburg: Former collective catalogue (until 1999) of Staatsbibliothek Berlin and several other libraries (university libraries FU Berlin, TU Berlin, HdK Berlin, TU Cottbus, Europa-Universität Viadrina Frankfurt/Oder; Deutsches Historisches Museum). Will be succeeded by KOBV
• GBV Gemeinsamer Bibliotheksverbund Nord, GBV Online. More than 170 academic or public libraries of Bremen/Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Sachsen-Anhalt, Schleswig-Holstein, Thüringen. Gives also separate access to the regional subsystems of Braunschweig, Göttingen, Hamburg and Hannover.
• HBZ Hochschulbibliotheks-Zentrum Nordrhein Westfalen: Collective Catalogue of the university libaries in Nordrhein-Westfalen
• HEBIS Hessisches Bibliotheks-Informationssystem, OPAC. Includes Darmstadt (Hessische Landes- und Hochschulbibliothek), Frankfurt a.M. (Stadt- und Universitätsbibliothek, Senckenbergische Bibliothek, Fachhochschule, Philosophisch-Theologische Hochschule St. Georgen), Fulda (Hessische Landesbibliothek, Fachhochschule), Gießen (UB, FHS), Kassel (Gesamthochschule), Mainz (UB, Stadtbibliothek), Marburg (UB, Johann-Gottfried-Herder-Institut).
• KIVK Kirchlicher Verbundkatalog, OPAC: 71 (mostly German) libraries
• KOBV Kooperativer Bibliotheksverbund Berlin-Brandenburg, OPAC: Union catalogue of university libraries in Berlin and Brandenburg, includes currently FU Berlin, HU Berlin, TU Berlin, HdK Berlin, UB Potsdam
• SWB Südwestdeutscher Bibliotheksverbund, OPAC Collective catalogue for "Monographien und Zeitschriften der wissenschaftlichen Bibliotheken von Baden Württemberg, Sachsen, der Pfalz, des Saarlands (nur Zeitschriften), und einiger Spezialbibliotheken anderer Bundesländer". For some of these libraries there exist additional meta search interfaces:
  • OLIX Recherche Freiburg i.Br.: UB Freiburg and related libraries, Staddtbibliothek Freiburg, Badische Landesbibliothek, UB Karlsruhe, Universitätsinstitute Karlsruhe, Stuttgarter Gesamtkatalog, UB Kaiserslauten, UB Tübingen
  • UB Karlsruhe - Literaturrecherche in verschiedenen Katalogen: interface to search the catalogues of UB Karlsruhe, Universitätsinstitute Karlsruhe, Badische Landesbibliothek, Forschungszentrum Karlsruhe, Bibliographie Bundesgerichtshof, UB Freiburg, UB Hohenheim, UB Kaiserslautern, UB Mannheim, Hochschule für Verwaltungswissenschaften Speyer, UB/Univ. Stuttgart, Stuttgarter Gesamtkatalog, Württembergische Landesbibliothek, UB/Univ. Tübingen
  • UB Karlsruhe - Rheinland-Pfalz OPAC: UB Kaiserslautern, UB Mainz, Rheinische Landesbibliothek (announced), UB Trier, simultaneous search possible.
  • See also KVK

Germany: Berlin

• MetaOPAC Berlin-Brandenburg: meta search engine, includes: DBI, FUB, FHI, HMI, HUB, MDC, MPI für Bildungsforschung, TUB, WZ Berlin, and several OPACs of Brandenburg
• AGB Amerika-Gedenkbibliothek: see ZLB
• BBAW Berlin-Brandenburgische Akademie der Wissenschaften, Kataloge
• BStB Berliner Stadtbibliothek: see ZLB
• BBF Bibliothek für Bildungeschichteliche Forschung, Katalog
• DBI Deutsches Bibliotheksinstitut: see DBI
• FUB Freie Universität Berlin, OPAC
• FHI Fritz-Haber-Institut Berlin
• HdK Berliner Hochschule der Künste, OPAC
• HMI Hahn-Meitner-Institut, OPAC
• HUB Humboldt-Universität Berlin: Universitätsbibliothek, OPAC, alternative search interface
• IAI Ibero-Amerikanisches Institut - Sammlung Preußischer Kulturbesitz, Katalog
• Max-Planck-Institut für Bildungsforschung
• MDC Max Delbrück Center for Molecular Medicine, Library
• SBB Staatsbibliothek Berlin - Preußischer Kulturbesitz, Kataloge: currently still to be accessed via DBI
• Senatsbibliothek Berlin, Katalog
• TUB Technische Universität Berlin, Bibliotheken, OPAC
• VÖBB Verbund Öffentlicher Bibliotheken Berlins: various district libraries (Bezirksbibliotheken) in Berlin
• WZ Wissenschaftszentrum Berlin, OPAC
• ZLB Zentral- und Landesbibliothek Berlin, OPAC online catalogue of Amerika Gedenkbibliothek (AGB), Berliner Stadtbibliothek (BStB) and Zentrum für Berlin-Studien (ZBS)
• ZLB-baC Berliner Allegro-Katalog: combines ZLB and catalogues of all district libraries.
• ZfL Zentrum für Literaturforschung

Great Britain

Nationwide search

• BOPAC2: simultaneous search in more than 30 British and other catalogues
• COPAC Consortium of University Research Libraries, Collective catalogue for the university libraries of Birmingham, Cambridge, Durham, Edinburgh, Glasgow, Leeds, Liverpool, University of London, University College London, Imperial College (London), Manchester, Nottingham, Oxford, School of Advanced Studies, Sheffield, Southampton, Trinity College Dublin, Warwick

Individual libraries

• The British Library Online Catalogue
• National Library of Scotland, Catalogues & online resources
• National Library of Wales, Databases and catalogues
• University of Aberdeen, Library, Webpac, telnet access
• University of St. Andrews, Library, SAULCAT Web Cataloge, telnet access
• University of Birmingham, Information Services Library Catalogue
• University of Brighton, Library
• University of Bristol, catalogue
• University of Cambridge, WWW catalogue
• Trinity College Cambridge, Library Catalogue
• University of Durham, Library, catalogue
• University of Edinburgh, catalogue
• University of Exeter, Library catalogue,
• University of Glasgow, Library, Library catalogue
• University of Hull, library catalogue
• University of Kent at Canterbury, catalogue
• University of Leeds, Library catalogue,
• City University London, catalogue
• Imperial College of Science, Technology, and Medicine (London), libraries, catalogues
• Kings College (London), Library Services, catalogue
• University College London, Library, catalogue
• University of London Library, Combined Library Catalogue (includes School of Slavonic and East European Studies, Heythrop College Library, Combined Rare Book Collection)
• University of Manchester, John Rylands University Library, Catalogue Web Service
• University of Oxford, OLIS - Oxford University libraries' online catalogue
• University of Reading, Library, catalogue
• University of Surrey, TalisWeb Catalogue
• University of Sussex at Brighton, catalogue
• University of Wales Bangor, Information Services, catalogue
• University of York, Library, telnet access

Ireland

• National Library of Ireland, Catalogues
• Trinity College Dublin, Library, can be searched via COPAC
• University College Cork, Boole Library

Italy

Nationwide search:

• MAI MetaOpac Azalai Italiano (ca. 130 Italian OPACS)
• ICCU Servizio Bibliotecario Nazionale (Indice SBN) and other databases of the Istituto Centrale per il Catalogo Unico (ICCU)
  • Z39.50/WWW interface
  • Z39.50/WWW gateway at the Library of Congress, select: "Italian National Library Service - SBN Servizio Bibliotecario Nazionale (ICCU)"
• CUBAI Catalogo Unico delle Biblioteche Astronomiche Italiane: Trieste, Arcetri, Roma Monte Porzio, Cagliari, Bologna

Piemonte:

• Catalogo Collettivo delle Biblioteche Piemontesi (Polo regionale piemontese SBN): University libraries and other academic, public and ecclesiastic libraries in Torino, Acqui Terme, Alba, Alessandria, Asti, Borgomanero, Bose, Bra, Carmagnola, Casale, Cherasco, Chieri, Collegno, Cuneo, Fossano, Ivrea, Monferrato, Mondovì, Novara, Novi Ligure, Ovada, Pinerolo, Susa, Torre Pellice, Stresa, Tortona, Valenza, Varallo, Verbania, Vercelli (for a full list click here).

Lombardia:

• CILEA Consorzio Interuniversitario Lombardo per l'Elaborazione Automatica, Catalogo Bibliografico Virtuale delle Università lombarde (Milano, Bergamo, Brescia, Pavia)
• Catalogo Unico Parmense
• Polo Regionale Lombardo SBN, OPAC: civic libraries of the provinces of Bergamo, Brescia, Como, Cremona, Lecco, Lodi, Mantova, Milano, Pavia, Varese, Sondrio

Veneto:

• IUAV Polo SBN Veneziano & Istituto Universitario di Architettura

Bologna & Emilia Romagna:

• Polo Bibliotecario Bolognese SBN: Online catalogue of the Università di Bologna and various communal and other libraries of the Emilia Romagna (Bologna, Imola, San Giovanni in Persiceto)
• Catalogo Biblioteche Provincia di Bologna

Ferrara:

• ESTE CAT Catalogo collettivo delle Biblioteche della Provincia di Ferrara
• Biblioteca Ariostea e Polo ferrarese SBN
• Università di Ferrara

Toscana:

• MetaOpac Regione Toscana (Università di Firenze, Giunta Regionale, Provincia di Livorno, Provincia di Prato, REA.net (Rete delle Biblioteche lungo l'Elsa e l'Arno), SBIAF, Provincia di Arezzo, Servizio Bibliotecario Senese
• BNCF Biblioteca Nazionale di Firenze, OPAC (includes Biblioteca Marucelliana)
• Accademia della Crusca: telnet access, login: BIB, logout: STOP
• IRIS Associazione di biblioteche storico-artistiche e umanistiche a Firenze, OPAC: Berenson Library (Villa i Tatti), Uffizi, Fondazione Roberto Longhi, Istituto Nazionale di Studi sul Rinascimento, Opificio delle Pietre Dure, Dutch University Institute of Art History
• IMSS Istituto e Museo di Storia della Scienza
• KHI Kunsthistorisches Institut in Florenz, OPAC (includes Zentralinstitut für Kunstgeschichte (München) and Bibliotheca Hertziana (Rome)
• The British Institute of Florence, Harold Acton Library
• BIFI Catalogo Unico delle Biblioteche Comunali fiorentine (former OPAC)
• SBIAF SBIAF Sistema Bibliotecario Integrato dell'Area Fiorentina: Bagno a Ripoli, Calenzano, Fiesole, Greve in Chianti, Impruneta, Lastra a Signa, San Casciano Val di Pesa, Scandicci, Sesto Fiorentino, Signa, Gabinetto Scientifico-Letterario Vieusseux, Giunta Regionale Toscana

Rome:

• Biblioteca Apostolica Vaticana: see URBS
• CASPUR Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Old OPAC / New experimental OPAC
• URBE Unione Romana Biblioteche Ecclesiastiche (URBE), OPAC
• URBS Unione Romana Biblioteche Scientifiche (American Academy, Biblioteca Apostolica Vaticana, British School, Danish Academy, École Française, Finnish Institute, Istituto Patristico «Augustinianum», Libera Università Maria SS. Assunta, Österreichisches Kulturinstitut, Norwegian Institute, Spanish School, Swedish Institute)

Netherlands

• Koninklijke Bibliotheek, Den Haag
• Universiteitsbibliotheek Groningen
• Universiteitsbibliotheek Utrecht

Norway

• BYBSYS: "shared library system for all Norwegian University Libraries, the National Library and a number of research libraries"

Poland

• The Jagellonian Library, Cracow
• The Catholic University of Lublin
• The Sejm Library, Warsaw

Portugal

• Biblioteca Nacional, PORBASE / PORBASE - National Bibliographic Database (telnet access from 8:30 to 19:30 local time). "PORBASE is the Online Union Catalogue of the Portuguese libraries. Established in 1986, PORBASE is coordinated by IBL and its OPAC is available since 1988. PORBASE main objectives are the automation of the General Catalogue of the National Library, including the current Portuguese bibliography, and the construction of the national union catalogue, through the participation of contributing libraries"

Spain

• BPE Bibliotecas Públicas del Estado: Collective catalogue for the Public Libraries of the State in Andalucía, Aragón, Baleares, Canarias, Cantabria, Castilla La Mancha, Castilla y León, Cataluña, Galicia, La Rioja, Madrid, Melilla, Murcia, Pais Vasco, Valencia
• CCPB Catálogo Colectivo del Patrimonio Bibliogràfico: monographs printed in Spain (15th-20th cent.) and in deposit in Spanish libraries
• CCUC Catàleg Col·lectiu de les Universitats de Catalunya: Collective catalogue of Universitat de Barcelona, Universitat Autònoma de Barcelona, Universitat Politècnica de Catalunya, Universitat Pompeu Fabra, Universitat de Girona, Universitat de Lleida, Universitat Rovira i Virgili, Universitat Oberta de Catalunya, Biblioteca de Catalunya
• CSIC Consejo Superior de Investigaciones Científicas, Red de Bibliotecas (Catalógos CIRBIC): Collective catalogue of various scientific libraries
• RUECA Red Universitaria Española de Catálogos Absys Collective catalogue of Universidad Carlos III de Madrid, Universidad de Castilla-La Mancha, Universidad de La Rioja, Universidad de Murcia, Universidad Pontificia Comillas de Madrid
• RUEDO Red Universitaria Española Dobis/Libis: Collective catalogue of Universidad de Alicante, Universidad de Córdoba, Universidad de Deusto, Universidad de Granada, Universidad de Navarra, Universidad Nacional de Educación a Distancia (UNED), Universidad de Oviedo, Universidad del País Vasco, Universidad de las Palmas, Universidad Politécnica de Madrid, Universidad de Sevilla, Universidad de Valladolid
• BNE Biblioteca Nacional

Switzerland

• IDS Informationsverbund Deutschschweiz (Basel, Bern, Zürich, Sankt Gallen, Luzern)
• RERO Réseau des bibliothèques romandes et tessinoises (Fribourg, Genève, Neuchâtel, Valais, Vaud)
• NEBIS Netzwerk von Bibliotheken und Informationsstellen in der Schweiz (ETH Zürich and other, mostly technical, institutions)
• SGBN Sankt Galler Bibliotheksnetz, OPAC

United States

• LOCIS Library of Congress, can also be searched via DB Connect or via DDB Z39.50 Gateway and other OPACs
• Brown University, Library Catalogue
• CDL California Digial Library, shared collections of the University of California, includes the Melvyl Union Catalogue and California Periodicals Database.
• University of Chicago -- Library: Catalogue
• CRLCatalog Center for Research Libraries -- Catalog
• CARL Colorado Alliance of Research Libraries, Search
• Columbia University -- Libraries / Resources -- Catalogs
• CIC Committee on Institutional Cooperation (CIC), Virtual Electronic Library (VEL) (through U of Chicago). Gives access to the following library catalogues: U of Chicago, U of Illinois-Chicago, U of Illinois-Urbana, Indiana U, U of Iowa, U of Michigan, Michigan State U, U of Minnesota, Northwestern U, Ohio State U, Pennsylvania State U, Purdue U, Purdue Media Library, Wayne State U, U of Wisconsin Madison.
• Cornell University -- Library -- Catalog
• Dartmouth College -- Library Catalogue
• Duke University -- Library Catalogue
• Emory University -- Library Catalogue
• Florida State University -- Libraries Databases
• Georgetown University -- Lauinger Library -- Catalog
• Harvard University -- Harvard OnLine Library Information System (HOLLIS)
• Iowa State University online catalogue
• University of Minnesota -- Libraries
• State University of New York at Stony Brook -- Library Catalogue
• University of Notre Dame:
  • University Libraries
  • Online Catalogue of the John A. Zahm Dante Collection
  • Inventory-Catalogue of the Drawings in the Biblioteca Ambrosiana
• Princeton University -- University Libraries -- Catalog
• University of Washington -- University Libraries -- Catalog
• University of Wisconsin -- Library Catalogue
• Rutgers University -- Libraries
• University of South Carolina -- Library -- UCSCAN
• University of Southern California -- Library -- Catalog
• University of Virginia -- Library -- Catalogue
• Yale University -- Library Catalogue