OBSTETRICS AND GYNECOLOGY
St. Luke's Regional Medical Center Library, 9 years and current

OBSTETRICS AND GYNECOLOGY CLINICS OF NORTH AMERICA
Mercy Medical Center Library, 1995 2007

OCCUPATIONAL HEALTH NURSING (now AAOHN JOURNAL)
Briar Cliff University Library, 1983 1985

OCCUPATIONAL OUTLOOK QUARTERLY
Briar Cliff University Library, summer 1988-current
Sioux City Public Library: Main, 5 years and current, microfilm spring 1980 fall 1995

OCEANS
Sioux City Public Library: Main, microfilm 1983 April 1989

OFF ROAD
Sioux City Public Library: Main, microfilm 1983 April 1996

OFFICE
Sioux City Public Library: Main, microfilm 1992 October 1993

OFFICE ADMINISTRATION AND AUTOMATION (now ADMINISTRATIVE MANAGEMENT)
Sioux City Public Library: Main, microfilm 1983 September 1985

OFFICE PRO (formerly SECRETARY)
Western Iowa Tech Library, current 3 years

OFFICER
Briar Cliff University Library, 1997-current

OFFICIAL BULLETIN OF THE NATIONAL SOCIETY OF THE SONS OF THE AMERICAN REVOLUTION see SAR MAGAZINE

OLD WESTMORELAND
Sioux City Public Library: Main, genealogy section, August 1980-January 1994

OLMSTEAD COUNTY GENEALOGICAL SOCIETY
Sioux City Public Library: Main, genealogy section, September 1984 January 1998

OMAHA WORLD HERALD (newspaper)
Briar Cliff University Library, 2 months and current, daily edition only
Morningside College Library, 3 months and current, Sunday edition only
Sioux City Public Library: Main, 6 months and current; Schroeder Morningside Branch, 1 month and current
Western Iowa Tech Library, current month only

OMNI (no subscriptions--newsstands only)
Sioux City Public Library: Main, microfilm 1983 November 1985, July 1991 winter 1995

ON THE HORIZON
Western Iowa Tech Library, current 3 years

ONAWA DEMOCRAT (newspaper)
Western Iowa Tech Library, current month only

ONAWA SENTINEL (newspaper)
Western Iowa Tech Library, current month only

ONLINE
Briar Cliff University Library, 1993-current
Sioux City Public Library: Main, microfilm 1983 January/February 1996

OPERA NEWS
Briar Cliff University Library, September 29, 1962 March 10, 1973, December 10, 1977 current
Morningside College Library, 1984 2003
Sioux City Public Library: Main, microfilm 1983 March 30, 1996

OPHTHALMIC SURGERY (now OPHTHALMIC SURGERY AND LASERS)
Mercy Medical Center Library, 1995

OPHTHALMIC SURGERY AND LASERS (formerly OPHTHALMIC SURGERY)
Mercy Medical Center Library, 1995-2003

OPRAH MAGAZINE
Sioux City Public Library: Schroeder-Morningside Branch, 3 years and current; Perry Creek Branch, 12 months and current
Western Iowa Tech Library, 2001-current

O : AT HOME
Sioux City Public Library: Sioux City Public Library, summer 2007-current

ORAL SURGERY, ORAL MEDICINE, ORAL PATHOLOGY, ORAL RADIOLOGY, AND ENDODONTICS
Mercy Medical Center Library, 1995-current

ORANGE COUNTY CALIFORNIA GENEALOGICAL SOCIETY QUARTERLY
Sioux City Public Library: Main, genealogy section, March 1982 current

ORGANIC GARDENING
Sioux City Public Library: Schroeder-Morningside Branch, 3 years and current

ORGANIZATIONAL BEHAVIOR AND HUMAN DECISION PROCESSES (formerly ORGANIZATIONAL BEHAVIOR AND HUMAN PERFORMANCE)
Morningside College Library, 1985 current

ORGANIZATIONAL BEHAVIOR AND HUMAN PERFORMANCE (now ORGANIZATIONAL BEHAVIOR AND HUMAN DECISION PROCESSES)
Morningside College Library, 1976 1984

ORGANIZATIONAL DYNAMICS
Briar Cliff University Library, spring 1988 spring 2000
Morningside College Library, 1975 current

ORIGINS
Briar Cliff University Library, October 3, 1974 December 11, 1975, June 8, 1978 current

ORTHOPAEDIC NURSING
Morningside College Library, 1991 2003
St. Luke's Regional Medical Center Library, 9 years and current

ORTHOPEDIC CLINICS OF NORTH AMERICA
Mercy Medical Center Library, 1995 2007

OTHER SIDE
Morningside College Library, 1981 current

OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA
Mercy Medical Center Library, 1995 2007

OUR SUNDAY VISITOR (newspaper)
Briar Cliff University Library, 10 years and current

OUTDOOR AMERICA
Sioux City Community High Schools: West, Fall 2005-Summer 2007

OUTDOOR LIFE
Briar Cliff University Library, 1988-December 1999/January 2000
Heelan High School, 5 years-current
Sioux City Community High Schools: East, 2006 and current; North, 3 years and current; West, 5 years and current
Sioux City Public Library: Main, microfilm 1983 March 1996
Western Iowa Tech Library, current 3 years

OUTSIDE
Sioux City Community High Schools: North, 5 years and current (issues missing); West, October 1997-September 1999

OXFORD ECONOMIC PAPERS
Morningside College Library, 1968 1998