sort by Rank | Alpha
| Possible Meanings | Rank |
| Policy Reference File | **** |
| Polynomial Root Finder | **** |
| Plymouth Rock Foundation | **** |
| Preliminary Registration Form | **** |
| Poster Request Form | **** |
| Protocol Review Form | **** |
| Physiotherapy Research Foundation | **** |
| Product Request Form | **** |
| Parkinson Research Foundation | *** |
| Pacific Rim Foods | *** |
| Pulse Rate Frequency | *** |
| Plastics Recycling Foundation | *** |
| Primitive Recursive Functions | *** |
| Prolactin Releasing Factor | *** |
| Partido Revolucionario Febrerista | *** |
| Pixel Run Format | *** |
| Petawawa Research Forest | *** |
| Policy Research Fund | *** |
| Peoples Rights Fund | *** |
| Problems in the Field | *** |
| Pattern Recognition Filter | *** |
| Polychrome Recursive Format | *** |
| Poverty Reduction Fund | *** |
| Phenol Resorcinol Formaldehyde | *** |
| Publications Reference File | *** |
| Proposal Routing Form | *** |
| Pennsylvania Renaissance Faire | *** |
| Project Red Flag | *** |
| Phenol Red Free | *** |
| Postdoctoral Research Fellowships | *** |
| Polish Rural Forum | *** |
| Pain Relief Foundation | *** |
| Patient Record Forms | *** |
| Poliomyelitis Research Foundation | *** |
| Parachute Refurbishment Facility | *** |
| Physical Register Files | *** |
| Patient Registration Form | ** |
| Patient Request Form | ** |
| Performance Reporting Facility | ** |
| perianeurysmal retroperitoneal fibrosis | ** |
| physical role functioning | ** |
| pinocytosis regulating factor | ** |
| pisatin-responsive factor | ** |
| plaque-reducing factor | ** |
| plasmacytoma repressor factor | ** |
| platelet release fraction | ** |
| platelet rosette factor | ** |
| plethodontid receptivity factor | ** |
| PMNL recruiting factor | ** |
| Poisson random field | ** |
| population receptive field | ** |
| post-reconstruction filtering | ** |
| postoperative renal failure | ** |
| postoperative respiratory failure | ** |
| preferential receptive field | ** |
| PRL releasing factor | ** |
| PRL)-releasing factor | ** |
| PRL-regulating factor | ** |
| PRL-releasing factor | ** |
| programmed ribosomal frameshifting | ** |
| Prolactin-regulating factor | ** |
| prolactin-releasing factors | ** |
| Prostatourethral-rectal fistula | ** |
| proton resonant frequency | ** |
| public residential facilities | ** |
| Performance Related Fees | ** |
| Positive Real Functions | ** |
| pressurized reverse flow | ** |
| Prolactin Releasing Factors | ** |
| Personnel Record Form | ** |
| Priorities and Risks Framework | ** |
| P-related fimbria | ** |
| P-related fimbriae | ** |
| Portable Report Format | ** |
| Pollution Recovery Fund | ** |
| Practice Review Facilitator | ** |
| Personality Research Form E | ** |
| pre-renal renal failure | ** |
| pre-reperfusion residual flow | ** |
| pressure of retrograde flow | ** |
| primary cultured renal fibroblasts | ** |
| Progressive Renal Failure | ** |
| Project Request Forms | ** |
| prolactin-release stimulating factor | ** |
| prolactin-release stimulatory factor | ** |
| Pasture Rangeland Forage | ** |
| Pseudo Relevance Feedback | ** |
| Point Response Functions | ** |
| production rate of F | ** |
| Problem Report Forms | ** |
| Portable Report Files | ** |
| Patient Record Flags | ** |
| Port Reception Facilities | ** |
| Phased Rotation Function | ** |
| Poverty Reduction Funds | ** |
| Pasture Rangeland and Forage | ** |
| Paul Reichmann Family | ** |
| Patient Report Forms | ** |
| page refill failure | ** |
| Pavement Reinforcing Fabric | ** |
| Payment Request Forms | ** |
| Proposal Routing Forms | ** |
| Programme Ressources Forestieres | ** |
| pulse repetition frequencies | ** |
| Percentage of Regulated Flights | ** |
| Plastics Recovery Facility | ** |
| Pulsed Radio Frequency | ** |
| Punjab Rights Forum | ** |
| Periodic Response Factors | ** |
| Pseudomonas Resistance and Fenthion | ** |
| Prague Research Forum | ** |
| Prescription Record Forms | ** |
| Parochial Revenue Fund | ** |
| Practice Review Facilitators | ** |
| Permanent Reserved Forests | ** |
| Postgraduate Research Forum | ** |
| Performance Related Funding | ** |
| Personnel Readiness Folder | ** |
| Pollution Reduction Facilities | ** |
| Probe Request Frames | ** |
| Polyclonal Rheumatoid Factor | ** |
| Public Rights Features | ** |
| Period of the Fellowship | ** |
| Personnel Readiness Folders | ** |
| Position Request Forms | ** |
| Primary Road Fund | ** |
| Personal Record Form | ** |
| Population Receptive Fields | ** |
| Product Recycling Fund | ** |
| Program Revenue Federal | ** |
| Partido Republicano Fluminense | ** |
| Partnership Review Forum | ** |
| Physical Review Focus | ** |
| Personnel Resources Form | ** |
| PHARE Revolving Fund | ** |
| Progressive Respiratory Failure | ** |
| Pulse repitition frequency | ** |
| Popular Revolutionary Forces | ** |
| Premier Racquets Fitness | ** |
| Progeria Research and the Formation | ** |
| Pattern Recognition Factors | ** |
| Policy Research Fellowship | ** |
| Primary Retail Frontages | ** |
| Professional Responsibility Forms | ** |
| Pl Rubber Flooring | * |
| Primary Reference Fuels | * |
| Project Reference Files | * |
| Purchase Request Form | * |
| Palestinine Rowing Fedration | * |
| Pavement Research Facility | * |
| Permanent Regional Facilities | * |
| Physical Regeneration Funds | * |
| Pollutant Reduction Facilities | * |
| Position Requisition Forms | * |
| Potential Requirements File | * |
| Prioritization Ranking Form | * |
| Promotion Recommendation Forms | * |
| Puls Repetition Frequency | * |
| Parts Return Form | * |
| Permanent Reserve Forests | * |
| Personal Record Files | * |
| pollution reduction facility | * |
| Program Record Forms | * |
| Promising Researcher Fellowship | * |
| Proteomics Resource Facility | * |
| Publication Reference File | * |
| Peace Reconstruction Foundation | * |
| Personal Reserve Funds | * |
| Plastics Recycling Facilities | * |
| Plot Request Files | * |
| Prescribed Radiation Facilities | * |
| Project Return Foundation | * |
| Pulse Response Functions | * |
| partner research form | * |
| Peter R Feuchtwanger | * |
| Plastic Recycling Facilities | * |
| Polar Radiation Flux | * |
| Precision Roll Feed | * |
| PRIMATE RESEARCH FACILITY | * |
| Product Return Form | * |
| Program Reorder Form | * |
| Pulse Repetition Frequecies | * |
| Parks and Recreation Facilities | * |
| Plugging and Restoration Fund | * |
| Penetration Room Filtration | * |
| Proficiency Recognition File | * |
| Property Removal Form | * |
| Prem Rowat Foundation | * |
| Panda Release Fund | * |
| Parc de Ricriation de Frontenac | * |
| Pentecostal Revival Fellowship | * |
| Pine Ridge Fuel | * |
| Plains Rough Fescue | * |
| Polfcia Rodovißria Federal | * |
| pollutant removal fraction | * |
| Possum Ridge Five | * |
| Post Resumes Free | * |
| Prediction Research Facility | * |
| Press Releases and Foreign | * |
| Process Recovery Fluid | * |
| Process Recovery Fluids | * |
| Processing Requirements and Facilities | * |
| Pulse Repetition Frequency/Pulse-Rate Frequency | * |