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- Oath of Allegiance
- Off-Campus Housing, Residential Life & University Conference Services - (818) 677-2160
- Office of Student Success - (818) 677-2600
- Office of University Web Communications - (818) 677-7917
- On-Campus Housing, Residential Life & University Conference Services - (818) 677-2160
- One Campus, One Book
- Online Instruction - (818) 677-6558
- Online Library Catalog - (818) 677-2285
- Online Registration
- Open Gym
- Open University - (818) 677-2504
- Operation Chicano Teacher, Dept of, Chicano Studies - (818) 677-2734
- Orange Grove Bistro - (818) 677-2076
- Organizations, Student - (818) 677-2393
- Orientation - (818) 677-2393
- Outdoor Adventures, A.S. Rec - 677-4453
- Outreach & Recruitment, Student - (818) 677-2967