sort by Rank | Alpha
| Possible Meanings | Rank |
| One Page Information | **** |
| Oxford Policy Institute | **** |
| Of Public Information | **** |
| Office of Performance Improvement | **** |
| Only at Professional | **** |
| Output Price Index | **** |
| Organised by the Polish | **** |
| Operational Performance Indicators | **** |
| Outcomes and Performance Indicators | **** |
| Odense Production Information | **** |
| Of Primary Interest | *** |
| Office of Paranormal Investigations | *** |
| Oregon Project Independence | *** |
| Office Products Interiors | *** |
| Olympic Park Institute | *** |
| Ohio Public Images | *** |
| Oral Proficiency Interviews | *** |
| Open Prototype Initiative | *** |
| Osprey Programming Interface | *** |
| Official Poker Inc | *** |
| Open Platform Initiative | *** |
| Orient Petroleum International | *** |
| Optimum Placements Inc | *** |
| Object Passing Interface | *** |
| OHIO PENAL INDUSTRIES | *** |
| Overall Performance Index | *** |
| Objectif Projet Individuel | *** |
| Oak Pacific Interactive | *** |
| Organizacja Procesu Inwestycyjnego | *** |
| Organizational Productivity Institute | *** |
| Order of Perpetual Indulgence | *** |
| Over the Phone Interpreting | *** |
| Occupational Personality Inventory | *** |
| Olympic Precision Inc | *** |
| Ocular Protection Index | *** |
| Open Portal Initiative | *** |
| Orient Petroleum Inc | *** |
| Oregon Production Index | *** |
| orca petroleum inc | *** |
| output-pressure index | ** |
| oxygenator performance index | ** |
| Ocean Produce International | ** |
| Office of Program Integrity | ** |
| Office Professional and Institutional | ** |
| Online Placement Instrument | ** |
| Odontorium Products Inc | ** |
| on-line portal imaging | ** |
| Oregon Peace Institute | ** |
| Ocean Pacific International | ** |
| Oregon Performance Internship | ** |
| Ohio Pain Initiative | ** |
| Ohiopyle Prints Inc | ** |
| Other Peoples Ideas | ** |
| Open Programming Interface | ** |
| Online Product Information | ** |
| Out Performance Incentive | ** |
| OLR precipitation index | ** |
| Oklahoma Performance Index | ** |
| Oxidative Potential Index | ** |
| Operations and Physical Infrastructure | ** |
| Ouest Provence Initiative | ** |
| Officer of Primary Interest | ** |
| Orientation Professionals Institute | ** |
| Oracle Programmatic Interface | ** |
| Obsessive Products Inc | ** |
| OF PARANORMAL INVESTIGATIONS | ** |
| Optimal Performance Institute | ** |
| Olympic Peninsula Institute | ** |
| Open Press Interface | ** |
| Office of Public Inquiries | ** |
| Operational Performance Improvement | ** |
| Overseas Property Investments | ** |
| Oil Politics International | ** |
| Overview of the Petroleum Industry | ** |
| Organisasi Profesi Ilmiah | ** |
| Open Protocol Interface | ** |
| Outsourcing Professional Institute | ** |
| Option Programming Interface | * |
| Organisasi Pengarang Indonesia | * |
| Outdoor Program Introduction | * |
| Ozarks Preservation Inc | * |
| Offshore Pipelines, Inc. | * |
| Open Peripheral Interface | * |
| Optical Pulse Initiator | * |
| Organization for the Physically Impaired | * |
| Outreach and Partnership Initiative | * |
| Obligation Permission Interdiction | * |
| Odense Product Information | * |
| Oil Plants Institute | * |
| Open Projects Initiative | * |
| Oral Proficiency Inventory | * |
| Orland Park Illinois | * |
| Other Party Identification | * |
| On top Position Indicator | * |
| Oregon Property Inspections | * |
| Orient Petroleum Incorporated | * |
| Overseas Pakistan Investors | * |
| Ozark Plateau Initiative | * |
| Orbiter Payload Interrogator | * |
| Offensive Production Index | * |
| Organization for Plant Information | * |
| Office of Policy and Internation | * |
| Ohana Pacific Imports | * |
| One Partial Inspection | * |
| Online Plant Identification | * |
| Operational Plans and Interopera | * |
| Orbital Parts Incorporated | * |
| Organismo P·blico de Investigaci=n | * |
| Organizer of Prestigious Interna | * |
| Origin of the Petroleum Industry | * |
| Outpatient Payment Indicators | * |