Other
- Official U.S. PlayStation Magazine
- PlayStation Official Magazine (UK)
- Old Plymothian and Mannameadian, a former pupil of Plymouth College, England
- Opium
- Black–Scholes Option Pricing Model
- Organizational project management
- Other People's Money, a 1991 movie starring Danny DeVito
- Outsourced program management or Outsourced program manager, see Affiliate marketing
- Owner President Management Program, at Harvard Business School
Read more about this topic: OPM