O
- Odlozilik, Otakar, Papers (UPT 50 OD22)
- Office of Admissions. Applications for Admission (UPE 2.66)
- Office of Admissions. Entrance Examination Records (UPE 2.602)
- Office of Alumni Records. Compiled Indices of Appointments, Honorary Degrees, Publications, and Military Service (UPF 1.9)
- Office of Alumni Records. Master Alumni File Collection (UPF 1.8)
- Office of Assistance to the President for Special Projects. Dilys Winegrad Records (UPA 5.8 W767)
- Office of Assistance to the President. Office of the Assistant to the President for Federal Relations Records (UPA 5.7)
- Office of Assistance to the President. University Art Collection and Art Committee Records (UPA 5.2)
- Office of Athletic Communications Records (UPE 25)
- Office of Commonwealth Relations Records (UPF 500)
- Office of Creative Communications Photograph Collection (UPF 8.5CC)
- Office of International Programs Student Records (UPE 15.6)
- Office of Minority Affairs Records (UPC 2.9MI)
- Office of the Chaplain Boarderman's Lectureship in Christian Ethics Records (UPB 45.8)
- Office of the Executive Vice President. George A. Brakely Records (UPA 7.1B)
- Office of the Executive Vice President. Helen B. O'Bannon Records (UPA 7.1O)
- Office of the Executive Vice President. Paul H. Musser Records (UPA 7.1M)
- Office of the Executive Vice President. William H. DuBarry Records (UPA 7.1D)
- Office of the President Records. Gaylord Probasco Harnwell Administration (UPA 4 Harnwell)
- Office of the President Records. George William McClelland Correspondence (UPA 4 MC)
- Office of the President Records. Harold Edward Stassen and William Hagan DuBarry Administration (UPA 4 Stassen.DuBarry)
- Office of the President Records. Martin Meyerson Administration (UPA 4 Meyerson)
- Office of the President Records. McClelland and Stassen Administration (UPA 4 McClelland.Stassen)
- Office of the President Records. Sheldon Hackney Administration (UPA 4 Hackney)
- Office of the President Records. Thomas S. Gates Administration (UPA 4 Gates)
- Office of the President. President's Committee on University Life Records (UPA 5.9)
- Office of the Provost Records (UPA 6.4)
- Office of the Provost Records. Charles C. Harrison Administration (UPA 6.2H)
- Office of the Provost Records. Josiah H. Penniman Administration (UPA 6.2P)
- Office of the Provost Records. Paul H. Musser Administration (UPA 6.2M)
- Office of the Provost Records. William Pepper Administration (UPA 6.2Pep)
- Office of the Provost Records. William Smith Administration (UPA 6.2S)
- Office of the Provost. Duties of the Provost, Co-education, and the University's Relations to the State Records (UPA 6.1)
- Office of the Provost. Vice Provost for Research Records (UPA 6.9)
- Office of the Provost. Vice Provost for University Life Women's Oral History Project (UPA 6.11)
- Office of the Provost. Vice Provost's Departmental Records (UPA 6.8)
- Office of the Provost. Vice Provost's General Files (UPA 6.7)
- Office of the Recorder Records (UPA 9)
- Office of the Secretary Records (UPA 8)
- Office of the Secretary. Diploma Records (UPA 8.3)
- Office of the Secretary. Donald K. Angell Files (UPA 8.1 A583)
- Office of the Treasurer Records. Trustees of the Moore School of Electrical Engineering Files (UPH 4.1.[MSEE])
- Office of the Treasurer Records. University Real Estate Title Papers (UPH 500)
- Office of the University Architect Records. Harold Taubin Planning History (UPJ 9.4.[T])
- Osler, William, Collection (UPT 50 O81)