Les participants au programme d'amélioration d'OCLC sont répertoriés selon leur format bibliographique autorisé. Ces organismes sont spécialement autorisés à verrouiller, modifier et remplacer des notices dans WorldCat. Les participants au niveau d'amélioration standard peuvent remplacer la plupart des notices créées par des membres. Les participants au niveau d'amélioration national, principalement le personnel de catalogage de la Library of Congress (LC) et les participants au Program for Cooperative Cataloging (PCC), peuvent aussi remplacer la plupart des notices de niveau national (y compris les niveaux d'encodage vide et 1).
| Symbole |
Établissement |
Réseau |
Format |
| AAA |
Auburn University |
SOLINET |
BKS |
| AFQ |
Armed Forces Staff College |
FEDLINK |
BKS |
| AGL |
National Agricultural Library |
FEDLINK |
BKS  COM  MAP VIS  |
| AGX |
National Agricultural Library, Cooperative Project |
FEDLINK |
BKS |
| AZS |
Arizona State University |
Amigos |
BKS |
| AZU |
University of Arizona |
Amigos |
BKS |
| BGU |
Bowling Green State University |
OHIONET |
BKS REC SCO |
| BKL |
Brooklyn Public Library |
Nylink |
BKS |
| BOS |
Boston University |
NELINET |
BKS |
| BUF |
State University of New York at Buffalo |
Nylink |
BKS  SCO REC |
| BXM |
Boston College |
NELINET |
BKS |
| CAV |
Capital University Law Library |
OHIONET |
BKS |
| CAW |
California Academy of Sciences |
OCLC Western |
BKS |
| CDL |
San Diego County, Law Library |
OCLC Western |
BKS REC |
| CGP |
Chicago Public Library |
ILLINET |
BKS |
| CGU |
University of Chicago |
ILLINET |
BKS  REC  SCO  VIS  |
| CIN |
University of Cincinnati |
OHIONET |
REC SCO |
| CLA |
California State University, Los Angeles |
OCLC Western |
BKS |
| CLE |
Cleveland Public Library |
OHIONET |
BKS  COM REC |
| CLU |
University of California, Los Angeles |
OCLC Western |
BKS  SCO |
| COA |
University of Colorado at Denver and Health Sciences Center |
BCR |
BKS |
| COD |
University of Colorado, Boulder |
BCR |
BKS  |
| COO |
Cornell University |
Nylink |
BKS  |
| COP |
Colorado School of Mines |
BCR |
MAP |
| CPL |
Carnegie Library of Pittsburgh |
PALINET |
BKS REC SCO |
| CPO |
California State Polytechnic University, Pomona |
OCLC Western |
COM |
| CRL |
Center for Research Libraries |
ILLINET |
BKS  |
| CRU |
University of California, Riverside |
OCLC Western |
BKS |
| CSL |
University of Southern California |
OCLC Western |
BKS |
| CSS |
Columbus City Schools |
OHIONET |
COM |
| CUF |
University of San Francisco, Gleeson Library |
OCLC Western |
BKS |
| CUS |
University of California, San Diego |
OCLC Western |
BKS COM SCO |
| CUV |
University of California, Davis |
OCLC Western |
BKS SCO |
| CUY |
University of California, Berkeley |
OCLC Western |
BKS  |
| DAY |
University of Dayton |
OHIONET |
BKS  |
| DGW |
George Washington University |
OCLC Eastern |
BKS |
| EEM |
Michigan State University |
MLC |
BKS SCO |
| ELW |
Eden-Webster University |
MLNC |
REC |
| EMU |
Emory University |
SOLINET |
BKS REC VIS |
| ENG |
New England Conservatory |
NELINET |
REC SCO |
| ESU |
University of Strathclyde |
Europe & Africa |
BKS |
| EYM |
University of Michigan |
MLC |
SCO |
| EZK |
Cranbrook Academy of Art Library |
Independent |
BKS |
| FDA |
Florida State University |
SOLINET |
BKS |
| FMZ |
Florida State University Music Library |
SOLINET |
SCO |
| FNP |
University of North Florida |
SOLINET |
VIS |
| FSL |
Florida State University Law Library |
SOLINET |
BKS |
| FUG |
University of Florida |
SOLINET |
BKS  |
| FXG |
Florida International University |
SOLINET |
BKS |
| FXN |
Florida International University, Biscayne Bay Campus |
SOLINET |
BKS |
| GAO |
U.S. General Accounting Office |
FEDLINK |
BKS |
| GDD |
DeKalb County (Ga.) School System |
SOLINET |
VIS |
| GPO |
U.S. Government Printing Office |
FEDLINK |
BKS COM MAP VIS |
| GUA |
University of Georgia |
SOLINET |
BKS REC VIS |
| GWL |
George Washington University Law Library |
OCLC Eastern |
BKS |
| GZM |
University of Wisconsin, Madison |
WILS |
BKS  REC  SCO  |
| GZN |
University of Wisconsin, Milwaukee |
WILS |
REC SCO |
| HHG |
Harvard University, Houghton Library |
NELINET |
BKS |
| HLS |
Harvard University, Harvard College Library Technical Services |
NELINET |
BKS MAP |
| HMY |
Harvard University, Yenching Library |
NELINET |
BKS  |
| HNK |
Hong Kong University of Science and Technology |
Asia Pacific |
BKS |
| HRH |
Harry Ransom Humanities Research Center, University of Texas at Austin |
Amigos |
BKS REC SCO |
| HRM |
University of Hartford |
NELINET |
SCO |
| HUH |
University of Hawaii at Manoa |
OCLC Western |
BKS  |
| HVC |
Haverford College |
PALINET |
BKS |
| IAY |
University of Illinois, Chicago |
ILLINET |
BKS |
| IBI |
College of DuPage |
ILLINET |
VIS |
| IBV |
Newberry Library |
ILLINET |
BKS |
| IKG |
Champaign (Illinois) Public Library |
ILLINET |
REC |
| IKM |
Texas State Library |
Amigos |
BKS |
| ILI |
Indiana University School of Law, Indianapolis |
INCOLSA |
BKS  |
| INT |
University of North Texas |
Amigos |
SCO VIS |
| INU |
Northwestern University |
ILLINET |
BKS 
SCO |
| IPL |
Purdue University |
INCOLSA |
BKS |
| IQU |
University of New Mexico |
Amigos |
BKS SCO |
| ISL |
Indiana State Library |
INCOLSA |
BKS |
| IUB |
Indiana University School of Law |
INCOLSA |
BKS VIS |
| IUG |
Indiana University, Music ARL RECON |
INCOLSA |
REC SCO |
| IUL |
Indiana University |
INCOLSA |
BKS  MAP REC  SCO  VIS |
| IUP |
Indiana University-Purdue University, Indianapolis |
INCOLSA |
BKS |
| IXA |
University of Texas, Austin |
Amigos |
BKS  REC  SCO 
VIS |
| JED |
Cooperative Computer Services |
ILLINET |
BKS |
| JPL |
Jacksonville Public Library (FL) |
SOLINET |
REC VIS |
| JYJ |
Rock Valley College |
ILLINET |
BKS |
| KKU |
University of Kansas |
BCR |
BKS |
| KSU |
Kent State University |
OHIONET |
BKS
REC SCO
VIS |
| KUK |
University of Kentucky |
SOLINET |
REC SCO |
| KUM |
University of Kentucky Medical Center |
SOLINET |
BKS |
| LCD |
Library of Congress, Music Division, Research Services |
FEDLINK |
REC  SCO  |
| LCM |
Library of Congress, Sound Recordings |
FEDLINK |
REC  |
| LDL |
University of Nebraska, Lincoln |
NEBASE |
BKS |
| LHM |
United States Holocaust Memorial Museum |
FEDLINK |
BKS |
| LNN |
Library of Congress |
FEDLINK |
BKS
COM
REC
SCO |
| LRU |
Tulane University |
SOLINET |
BKS  |
| LUU |
Louisiana State University |
SOLINET |
BKS |
| MBB |
Brandeis University |
NELINET |
BKS |
| MCS |
Harvard University |
NELINET |
BKS |
| MDY |
Middlebury College |
NELINET |
BKS REC SCO |
| MHS |
Minnesota Historical Society |
MINITEX |
BKS |
| MIR |
Mira Costa College |
OCLC Western |
BKS |
| MNO |
Saint Olaf College |
MINITEX |
REC |
| MNS |
College of St. Scholastica |
MINITEX |
BKS |
| MPI |
Minneapolis Public Library |
MINITEX |
REC |
| MRH |
Hinds Community College |
SOLINET |
BKS |
| MRT |
Reformed Theological Seminary |
SOLINET |
BKS |
| MUM |
University of Mississippi |
SOLINET |
BKS |
| MUU |
University of Missouri—Columbia |
MLNC |
BKS |
| NAR |
National Archives & Records Service |
FEDLINK |
BKS |
| NCM |
Mars Hill College |
SOLINET |
BKS |
| NCS |
North Carolina State Library |
SOLINET |
BKS |
| NDD |
Duke University |
SOLINET |
BKS  |
| NDL |
Duke University Law Library |
SOLINET |
BKS  |
| NDS |
North Dakota State Library |
MINITEX |
BKS |
| NGU |
University of North Carolina, Greensboro |
SOLINET |
BKS SCO |
| NLM |
National Library of Medicine |
FEDLINK |
BKS  COM  VIS  |
| NMT |
New Mexico Institute of Mining and Technology |
Amigos |
MAP |
| NOC |
University of North Carolina, Chapel Hill |
SOLINET |
BKS  SCO |
| NOH |
University of North Carolina, Chapel Hill, Health Sciences Library |
SOLINET |
BKS |
| NPC |
Public Library, Charlotte & Mecklenburg County (North Carolina) |
SOLINET |
REC |
| NRC |
North Carolina State University |
SOLINET |
BKS |
| NTD |
University of Idaho |
OCLC Western |
BKS |
| NTE |
Washington State University |
OCLC Western |
BKS |
| NUI |
University of Iowa |
BCR |
BKS |
| NYG |
New York State Library |
Nylink |
BKS |
| NYP |
New York Public LibraryResearch Libraries |
Nylink |
BKS 
REC SCO  |
| OBE |
Oberlin College |
OHIONET |
BKS  REC SCO |
| OCO |
Columbus Metropolitan Library (OH) |
OHIONET |
REC
SCO |
| OHI |
State Library of Ohio |
OHIONET |
BKS |
| OI@ |
University of Cape Town |
Europe & Africa |
BKS |
| OIP |
Boise State University |
OCLC Western |
BKS |
| OKS |
Oklahoma State University |
Amigos |
BKS  |
| OL$ |
University of South Africa |
Europe & Africa |
BKS |
| OLA |
National Oceanic & Atmospheric Administration Central Library |
FEDLINK |
BKS |
| ONS |
Northwestern School of Law |
OCLC Western |
BKS |
| ORE |
Oregon State University Libraries |
OCLC Western |
BKS |
| ORU |
University of Oregon |
OCLC Western |
BKS  REC  SCO  |
| ORX |
Multnomah County Library |
OCLC Western |
BKS
REC SCO |
| ORZ |
Portland State University |
OCLC Western |
BKS |
| OSU |
Ohio State University |
OHIONET |
BKS  |
| OWK |
Kent State University, Trumbull Campus |
OHIONET |
BKS
REC
SCO
VIS |
| P@N |
Georgia Public Library Service, PINES |
SOLINET |
BKS REC VIS |
| PAU |
University of Pennsylvania |
PALINET |
BKS 
SCO  |
| PAULM |
University of Pennsylvania Rare Book and Manuscript Library |
PALINET |
BKS |
| PFM |
University of Pittsburgh Health Sciences Library |
PALINET |
BKS
VIS |
| PIT |
University of Pittsburgh |
PALINET |
BKS
VIS |
| PLT |
Lutheran Theological Seminary (PA) |
PALINET |
BKS |
| PRP |
Reformed Presbyterian Theological Seminary |
Independent |
BKS |
| RBN |
Brown University |
NELINET |
BKS |
| RER |
Eastman School of Music, ARL RECON |
Nylink |
SCO |
| RES |
Eastman School of Music |
Nylink |
REC  SCO  |
| RLA |
Alaska Resources Library and Information Services |
FEDLINK |
BKS |
| RQB |
Massachusetts Institute of Technology, Technical Publications, ARL RECON |
NELINET |
BKS |
| RQF |
University of Illinois, Agriculture Library, ARL RECON |
ILLINET |
BKS |
| RSG |
Rifkind Center, Los Angeles County Musuem of Art |
OCLC Western |
BKS |
| SAP |
San Antonio Public Library |
Amigos |
BKS |
| SLU |
Saint Louis University School of Law |
MLNC |
BKS  |
| SMI |
Smithsonian Institution |
FEDLINK |
BKS  |
| SPI |
Illinois State Library |
ILLINET |
MAP |
| SRB |
State Library of Ohio, SEO Branch |
OHIONET |
BKS
COM
REC
VIS |
| STF |
Stanford University |
OCLC Western |
BKS 
COM 
VIS  |
| SUC |
University of South Carolina |
SOLINET |
BKS |
| SYB |
Syracuse University |
Nylink |
BKS |
| TAI |
Texas A & M University, Kingsville |
Amigos |
BKS |
| TEF |
OCLC TechPro |
Independent |
REC SCO |
| TJC |
Vanderbilt University |
SOLINET |
BKS  |
| TKN |
University of Tennessee, Knoxville |
SOLINET |
VIS |
| TOZ |
Harvard University Tozzer Library |
NELINET |
BKS |
| TXA |
Texas A & M University |
Amigos |
BKS  MAP VIS  |
| TXI |
Southwest Texas State University |
Amigos |
VIS |
| UAA |
University of Alaska, Anchorage |
OCLC Western |
BKS |
| UBY |
Brigham Young University |
BCR |
BKS 
SCO  |
| UIU |
University of Illinois |
ILLINET |
SCO |
| UMC |
University of Maryland, College Park |
PALINET |
BKS  REC  SCO  VIS  |
| UMI |
University Microfilms International |
MLC |
BKS |
| UND |
University of North Dakota |
MINITEX |
BKS SCO |
| UOK |
Seattle Public Library |
OCLC Western |
BKS |
| UPM |
Pennsylvania State University |
PALINET |
BKS
MAP
VIS |
| UUS |
Utah State University |
BCR |
BKS |
| VA@ |
University of Virginia |
SOLINET |
BKS |
| VHC |
Hollins University |
SOLINET |
BKS SCO REC |
| VIC |
Library of Virginia |
SOLINET |
BKS |
| VPI |
Virginia Polytechnic and State University |
SOLINET |
BKS VIS |
| VQT |
Monroe Community College |
Nylink |
BKS |
| VRU |
University of Richmond |
SOLINET |
REC VIS |
| VVC |
Colgate University |
Nylink |
BKS |
| VZI |
Stony Brook Institute for Advanced Studies of World Religions |
Nylink |
BKS |
| WAU |
University of Washington |
OCLC Western |
BKS  COM  VIS  |
| WCM |
Williams College |
NELINET |
VIS |
| WDT |
Washington State Department of Transportation |
OCLC Western |
BKS COM REC VIS |
| WEA |
Eastern Washington University |
OCLC Western |
BKS |
| WIH |
State Historical Society of Wisconsin |
WILS |
BKS |
| WIQ |
Outagamie Waupaca Library System |
WILS |
BKS |
| WLL |
Marquette University Law Library |
WILS |
BKS |
| WRJ |
Washington State Library |
OCLC Western |
BKS |
| WTU |
Washington University at Saint Louis |
MLNC |
BKS REC SCO |
| WUL |
Washington University at Saint Louis, Law |
MLNC |
BKS |
| WYU |
University of Wyoming |
BCR |
BKS |
| XBM |
SUNY, Brockport |
Nylink |
BKS VIS |
| XII |
Saint Louis University |
MLNC |
BKS |
| YAM |
American Museum of Natural History |
Nylink |
BKS |
| YLS |
New York University Law School |
Nylink |
BKS  |
| YQR |
Rochester Public Library |
Nylink |
BKS |
| YSM |
SUNY at Stony Brook |
Nylink |
BKS |
| YUS |
Yale University |
NELINET |
BKS  |
| ZBL |
Brooklyn Law School |
Nylink |
BKS COM |
| ZBS |
American Bible Society |
Nylink |
BKS |
| ZCU |
Columbia University |
Nylink |
BKS  REC  SCO  VIS  |
| ZHM |
Hunter College |
Nylink |
BKS |
| ZP2 |
Heard Museum |
Amigos |
BKS |
| ZP7 |
Rio Rancho (New Mexico) Public Library |
Amigos |
BKS |
| ZQP |
Queens Borough Public Library |
Nylink |
BKS  |
| ZRS |
Russell Sage College |
Nylink |
BKS |
| ZSJ |
Saint John's University Library |
Nylink |
BKS |