| OIP | Observatoire International des Prisons 
| Others |
| OIP | Office for International Programs
| Others |
| OIP | Office Imaging Products
| Others |
| OIP | Office of Information and Privacy
| Others |
| OIP | Office of Information Policy
| Others |
| OIP | Office of Information Practices
| Others |
| OIP | Office of International
| Others |
| OIP | Office of International Programs
| Others |
| OIP | Office of the Iraq Program
| Others |
| OIP | Office of the Iraq Program Oil for Food
| Others |
| OIP | Ohio Improvement Process
| Others |
| OIP | Oil In Place
| Others |
| OIP | Open Infotainment Platform
| Others |
| OIP | Open Internet Platform
| Others |
| OIP | Open Internet Project
| Others |
| OIP | Opportunity Incentive Program
| Others |
| OIP | Optical Image Profiler
| Others |
| OIP | Oracle Internet Procurement
| Others |
| OIP | Orchestrator Integration Pack
| Others |
| OIP | Oregon Internet Properties
| Others |
| OIP | Organising interstitial pneumonia
| Others |
| OIP | Oriental Institute Publications
| Others |
| OIP | Original Iron Pin
| Others |
| OIP | Original Italian Pizza
| Others |
| OIP | Orthopedic Institute of Pennsylvania
| Others |
| OIP | Outsource Insurance Professionals
| Others |