| Acronym | Definition |
|---|
| OIP | Odyssey Investment Partners (Delaware) |
| OIP | Office of International Programs |
| OIP | Original Italian Pizza (various locations) |
| OIP | Office of Infrastructure Protection (US DHS) |
| OIP | Order Intercept Point |
| OIP | Observatoire International des Prisons (France) |
| OIP | Ohio Innocence Project (criminal justice) |
| OIP | Oracle Internet Procurement |
| OIP | Operations Improvement Program (various organizations) |
| OIP | Oil-In-Place |
| OIP | Office of Information and Privacy (US DOJ) |
| OIP | Office of the Iraq Programme |
| OIP | Opportunity Incentive Program (Cisco Systems) |
| OIP | Other Interested Parties |
| OIP | Oregon Internet Properties (real estate; Eugene, OR) |
| OIP | Operator Interface Panel |
| OIP | Organizational Inspection Program |
| OIP | Office of Institutional Planning (various locations) |
| OIP | Output Intercept Point |
| OIP | Organización Internacional de Periodistas (Spanish: International Organization of Journalists) |
| OIP | Optic Internet Protocol, Inc. |
| OIP | Oil Impregnated Paper |
| OIP | Office of International Partnerships |
| OIP | Organisation Internationale de Psychophysiologie (French: International Organization of Psychophysiology) |
| OIP | Order of Immediate Possession |
| OIP | Operations Integration Panel |
| OIP | Operating Internal Pressure |
| OIP | Open in Private |
| OIP | Oncology in Practice |
| OIP | Operational/Ordnance Improvement Plan/Program |
| OIP | Overhaul Inspection Procedures |
| OIP | Office and Industrial Park |
| OIP | Original Iron Pin (surveying) |
| OIP | Optimization with Input and Program Variables |