sort by Rank | Alpha
| Possible Meanings | Rank |
| Office of Infrastructure Protection | **** |
| Original Italian Pizza | **** |
| Ohio Innocence Project | **** |
| Oregon Internet Properties | **** |
| Open Interoperability Program | **** |
| Operations Implementation Plan | **** |
| Office of Injury Prevention | *** |
| Operational Improvement Plans | *** |
| Order Intercept Point | *** |
| Office of the Inspector | *** |
| Outreach Internship Program | *** |
| Operations Improvement Plan | *** |
| Office of Intercultural Programs | *** |
| Ocean Inquiry Project | *** |
| Oriental Institute Publications | *** |
| ONTARIO Internship Program | *** |
| Orthopedic Institute of Pennsylvania | *** |
| Ohio Improvement Process | *** |
| Order Instituting Proceedings | *** |
| Office of Inspector | *** |
| Oregon Innocence Project | *** |
| Ohio Innovation Partnership | *** |
| Oregon Immunization Program | *** |
| Ohio Institute of Photography | *** |
| Opportunity Identification Program | *** |
| Other International Partnership | *** |
| Open Interfaces Platform | *** |
| Office of Infantry Proponency | *** |
| Office of Intellectual Property | *** |
| Organisations Internationales Partenaires | ** |
| Office of Indigenous Policy | ** |
| occlusive impedance phlebography | ** |
| odorant-insensitive part | ** |
| Ophthalmomyiasis interna posterior | ** |
| optimal index powers | ** |
| osteogenesis inhibitory protein | ** |
| Outcome Improvement Plan | ** |
| Orientation and in Processing | ** |
| Official Index Period | ** |
| other interstitial pulmonary diseases | ** |
| Oyugis Integrated Project | ** |
| Of Infrastructure Protection | ** |
| Office of Innovation Partnerships | ** |
| Of International Partnerships | ** |
| Optical Image Processing | ** |
| Operational Improvement Program | ** |
| Occupational Interest Profile | ** |
| Operator Interface Panels | ** |
| Overbrook International Program | ** |
| Office of Infrastructure Preparedness | ** |
| Orally Inhaled Products | ** |
| Organize Indiana Project | ** |
| Orthostatic Intolerant Patients | ** |
| Osteoclast Inhibitory Peptide | ** |
| Overarching Integrated Product | ** |
| Office Information Profile | ** |
| Organizational Incentive Program | ** |
| Outsource Infrastructure Provider | ** |
| Office of Intergovernmental Programs | ** |
| Optical Information Processing | ** |
| Organization Inspection Policy | ** |
| Office of Industry Partnerships | * |
| Open Internet Platform | * |
| Originating Identity Presentation | * |
| Oost Indisch Pakhuis | * |
| Other Interested Persons | * |
| Occupational Interest Profiles | * |
| Operational Incentive Plan | * |
| Ovamboland Independence Party | * |
| Office of Information Programs | * |
| Open Institute of Psychotherapy | * |
| Operations Interface Procedures | * |
| Osdorp Internet Posse | * |
| Oyugis Integrated Projects | * |
| Ocean Ice Palace | * |
| Operations Interface Procedure | * |
| Organization Inspection Program | * |
| Opportunity Investment Planning | * |
| Optical Interferometer Project | * |
| Offical Index Period | * |
| Oklahoma Independent Petroleum | * |
| Object Interaction Protocols | * |
| Office In Poland | * |
| Office of Industrial Productivity | * |
| Office of Information Practices | * |
| Office of Intelligence Policy | * |
| Office of International Policy | * |
| Olympic Imported Parts | * |
| Oman Information Page | * |
| Online Information Page | * |
| Opel Interest Page | * |
| operational information process | * |
| Organization Inspection Programs | * |
| Organizational Improvement Programs | * |
| Ostriches Introduction Page | * |