| Adler Planetarium | AP$ |
| Adler School of Professional Psychology | KDU |
| AHA Resource Center | IHD |
| Alliance Francaise de Chicago | A5F |
| Altheimer & Gray | JDI |
| Alzheimer's Association | IA@ |
| American Bar Foundation Library | FZ9 |
| American College of Surgeons | YD7 |
| American Dental Association | JAA |
| American Dietetic Association Foundation | AP@ |
| American Health Information Management Assoc. | TA8 |
| American Library Association | IEH |
| American Medical Association | AMA |
| Andersen Consulting | IE4 |
| Appraisal Institute | YE5 |
| Argosy University Chicago Campus | AP4 |
| Arnstein & Lehr | JUN |
| Arthur Andersen & Company | TZE |
| Baker & McKenzie Law Library | LCV |
| Barack Ferrazzano Kirschbaum Perlman & Nagelberg | XJ6 |
| Bell, Boyd & Lloyd | JYI |
| Booz Allen & Hamilton, Inc. | KDQ |
| Boshes Neurosciences Library | BNE |
| Boston Consulting Group | JBQ |
| BP America | JUM |
| Brinks, Hofer, Gilson & Lione | YS8 |
| Burson-Marsteller, Inc. | TZD |
| Catholic Theological Union | IDJ |
| Center for Research Libraries | CRL |
| Center for Research Libraries UL | CRI |
| Center for Research Libraries--Newspaper Project | NPW |
| Chapman and Cutler | JFJ |
| Chicago Board of Trade | IEY |
| Chicago Board Options Exchange Library | EX2 |
| Chicago Historical Society | KAI |
| Chicago Library System | TQB |
| Chicago Mercantile Exchange | IHU |
| Chicago Public Library | CGP |
| Chicago Sinai Congregation | SQE |
| Chicago State University | IAA |
| Chicago Stock Exchange | IM# |
| Chicago Theological Seminary | IDG |
| Chicago Title & Trust | JUQ |
| Chicago Urban League | YG9 |
| Children's Memorial Hospital | JBB |
| City of Chicago Department of Law Library | IL1 |
| City of Chicago School District #299 | CH4 |
| City of Chicago School District #299 | KEJ |
| Clausen, Miller P.C. | ILP |
| Columbia College | IBZ |
| Cook County Hospital | JSJ |
| Cook County Law Library | JUR |
| Cooking & Hospitality Institute of Chicago | C5K |
| D'Ancona & Pflaum Law Firm | DP2 |
| Dawson Technical Institute | DDW |
| DDB Needham Worldwide | JWN |
| DePaul University Law Library | IBC |
| DePaul University Libraries | IAC |
| DeVry University | JVW |
| Downtown Campus Libraries | ILK |
| Edgewater Medical Center | JSL |
| Encyclopaedia Britannica | JNC |
| Erikson Institute | E4K |
| Evangelical Lutheran Church in America | JYH |
| Federal Reserve Bank of Chicago | ITT |
| Field Museum | IBT |
| First National Bank Law Library | KIA |
| Foley & Lardner | IHO |
| Foley & Lardner | YJ1 |
| Freeborn & Peters | IP1 |
| Funkhouser, Vegeson, Liebman & Dunn, Ltd. | AQ9 |
| Gardner, Carton & Douglas Library | JCZ |
| Gerber/Hart Library | GFK |
| Grant Hospital of Chicago | JHL |
| Grant Thornton LLP | YJ7 |
| Greeley and Hansen | IDR |
| Harold Washington College | IBJ |
| Harrington Institute of Interior Design | IEX |
| Hinshaw & Culbertson | KIB |
| Holland & Knight | KDR |
| Holy Cross Hospital | JIR |
| Illinois College of Optometry | JDR |
| Illinois Department of Employment Security | LBN |
| Illinois Institute of Technology | IAH |
| Illinois Masonic Medical Center | JOK |
| Illinois Newspaper Project, Chicago | CVF |
| Institute for Psychoanalysis | ZPC |
| International Association of Assessing Officers | ILW |
| Jackson Park Hospital | JIV |
| Jenner & Block | IPB |
| Jesuit-Krauss-McCormick Library | IDK |
| John D. & Catherine T. MacArthur Foundation | JWE |
| John G. Shedd Aquarium | IHW |
| John Marshall Law School | IUJ |
| Katten Muchin Zavis Rosenman | JNF |
| Kennedy-King College | IAN |
| Kirkland & Ellis | IBM |
| Latham & Watkins Library | JVI |
| Latin School of Chicago, Upper School | IJY |
| Legal Assistance Foundation | KIC |
| Levenfeld Pearlstein Library | XH2 |
| Lexington College | L6X |
| Library of the U.S. Courts | JUL |
| Lincoln Park Zoological Gardens | LCQ |
| Lord, Bissell & Brook | JJD |
| Louis A. Weiss Memorial Hospital | JIG |
| Loyola University of Chicago | IAL |
| Loyola University of Chicago School of Law | JDS |
| Loyola University, Medical Center | JFU |
| Loyola University, Rome Center | JFR |
| MacCormac College Library | ILMAC |
| Malcolm X College Library | JDX |
| Martec Group | G9M |
| Mayer, Brown, Rowe & Maw | JFY |
| McBride, Baker & Coles | KIF |
| McDermott, Will & Emery | JNH |
| Meadville Lombard Theological School | IDH |
| Mellander Library | JEX |
| Mercy Hospital & Medical Center | KDI |
| Michael Reese Hospital | IHA |
| Midwestern University | JFG |
| Moody Bible Institute | JBT |
| Museum of Contemporary Art | JJE |
| Museum of Science and Industry Library | KDL |
| Neal, Gerber & Eisenberg | KIG |
| Newberry Library | IBV |
| NORC Library | TZA |
| North Park University | ICZ |
| Northeastern Illinois University | IAO |
| Northwestern Business College | N2B |
| Northwestern University Medical Library | INM |
| Northwestern University School of Law Library | INL |
| Olive-Harvey College Library | JDV |
| Our Lady of the Resurrection Medical Center | KAE |
| Park Ridge Center | P6K |
| Passionist Academic Institute | JAQ |
| Peterson & Ross | JBN |
| Piper Rudnick | JNK |
| Pretzel & Stouffer | PS3 |
| Pritzker Research Library | J1B |
| Psychiatric Institute | JHF |
| Quaker Oats Company (Chicago) | KDO |
| Querrey & Harrow, Ltd. | ILQHL |
| Railroad Retirement Board Library | RRB |
| Ravenswood Hospital Medical Center Library | UE1 |
| Resurrection Medical Center | JVP |
| Richard J. Daley College | JDW |
| RJA Group, Inc. | GP2 |
| Robert Morris College | JVQ |
| Rooks, Pitts & Poust | KIK |
| Roosevelt University | IAR |
| Roseland Community Hospital | JNL |
| Rosenthal and Schanfield | XH4 |
| Ross & Hardies | JBP |
| Rush University | IDL |
| Sachnoff & Weaver | JFH |
| Sargent & Lundy LLC | YQ2 |
| Schiff Hardin & Waite | IBX |
| School of the Art Institute of Chicago | ILO |
| Schuyler Roche & Zwirner | SZW |
| Seyfarth Shaw | JBS |
| Shefsky Froelich & Devine Ltd. | S9F |
| Shriners' Hospital | JOH |
| Sidley Austin Brown & Wood | IFI |
| Skadden Arps Slate Meagher & Flom | KEF |
| Sonicraft, Inc. | JCB |
| Sonnenschein Nath & Rosenthal | ILV |
| Spertus Institute of Jewish Studies | JHU |
| St. Augustine College | IL9 |
| St. Elizabeth's Hospital | ZQ2 |
| St. Joseph Hospital & Health Care Ctr. | JDQ |
| St. Mary of Nazareth Hospital Center | JON |
| St. Xavier University | ICS |
| Swedish Covenant Hospital | JZG |
| The Illinois Institute of Art/Chicago | A4C |
| True North Communications, Inc. | JFO |
| Truman College | IEG |
| U.S. Attorney's Office | XJ5 |
| U.S. Environmental Protection Agency Region 5 | ELA |
| Ungaretti & Harris | KEG |
| Univ. of Chicago Library | IAB |
| University of Chicago | CGU |
| University of Chicago Law Library | KEH |
| University of Illinois at Chicago Health Sciences | IAX |
| University of Illinois at Chicago Main Library | IAY |
| VanderCook College of Music | JPT |
| Vedder, Price, Kaufman & Kammholz | JVO |
| Veteran Affairs Medical Center (Lakeside) | JSP |
| Veterans Affairs Medical Center (Westside) | KAR |
| Wilbur Wright College North | JDB |
| Wildman, Harrold, Allen & Dixon | JVV |
| William Blair & Company, L.L.C. | WC6 |
| Winston & Strawn | JAZ |
| World Book Publishing | IPZ |
Arranged By Region:
Arranged By Type of Library:
| Academic | Government | ILCSO | School |
| Business & Law | Health Sciences | Public | Theology |