sort by Rank | Alpha
| Possible Meanings | Rank |
| Phase Insulin Secretion | **** |
| Privacy Invasive Software | **** |
| Patient Information System | **** |
| project information summary | **** |
| Prague Information Service | **** |
| Production Information System | **** |
| Patent Information System | **** |
| Professional Indemnity Scheme | **** |
| Professional Investment Services | **** |
| Prescribing Incentive Scheme | *** |
| Purchasing Information System | *** |
| Performance Incentive Scheme | *** |
| parris island soldiers | *** |
| Perfectpicture Imaging System | *** |
| Poslovni Informacioni Sistem | *** |
| Plant Inspection Station | *** |
| Product Information Sheets | *** |
| Partai Indonesia Sejahtera | *** |
| Personnel Information System | *** |
| Palestinian Internet Services | *** |
| Portfolio Investment Scheme | *** |
| Primary Industries Science | *** |
| Perhaps the Industrial | *** |
| Politiets Indsats Styrke | *** |
| Participatory Information System | *** |
| Processed in System | *** |
| Project Information System | *** |
| Personal Information System | *** |
| Personal Informations System | *** |
| Project Integration Stream | *** |
| Privremene Institucije Samouprave | ** |
| Pain Intensity Scale | ** |
| pain intensity scores | ** |
| papillary index score | ** |
| patient information score | ** |
| peak interval sequence | ** |
| Peripheral Immune System | ** |
| peripheral insulin sensitivity | ** |
| Periventricular increased signal | ** |
| persistent insufficient sleep | ** |
| photoreceptor inner segments | ** |
| place-independent sensitization | ** |
| plasma-irradiated sandwitch | ** |
| Poison Information Specialist | ** |
| polled/intersex synchome | ** |
| porcine intestinal spirochaetosis | ** |
| porcine intestinal spirochetosis | ** |
| post injection sequence | ** |
| post ischemic syndrome | ** |
| post-injection sequence | ** |
| Post-irradiation sarcoma | ** |
| post-ischemic syndrome | ** |
| posterior impingement syndrome | ** |
| posterior interventricular sulcus | ** |
| posttraumatic intestinal stenosis | ** |
| pre-infarction syndrome | ** |
| Predicted infarction size | ** |
| pressure-induced strain | ** |
| primary immunodeficiency syndrome | ** |
| Primary Immunodeficiency Syndromes | ** |
| progressive ischaemic stroke | ** |
| proximal interlocking screw | ** |
| Pulmonary Index Score | ** |
| Pyogenic infectious spondylitis | ** |
| Polled Intersex Syndrome | ** |
| Portable Internet Service | ** |
| Polarization Independent Single | ** |
| 4-methyl-6-oxo-5-phenyl-6H-pyrazolo isoselenazole | ** |
| percent of intraluminal stenosis | ** |
| post-irradiation bone sarcoma | ** |
| posterior interosseous nerve syndrome | ** |
| Poslovno Informacioni Sistemi | ** |
| Puntland Intelligence Service | ** |
| Procurement Information System | ** |
| Pin in Standard | ** |
| Parkins Industrial Supplies | ** |
| Personal Information Sheet | ** |
| Product Information Systems | ** |
| Plastics Industry Statistics | ** |
| medications--protease inhibitors | ** |
| Plot Induce Stupidity | ** |
| Program Ilmu Sosial | ** |
| Patent Inventor Service | ** |
| Projektnega Informacijskega Sistema | ** |
| Performance Indicators Survey | ** |
| Poslovni Informacijski Sustav | ** |
| Process Information System | ** |
| Pass Interface Specification | ** |
| Personal Intelligent Service | ** |
| Public Investment Staff | ** |
| PASEP Imposto Sobre | ** |
| Praslin Island Seychelles | ** |
| Provincial Irrigation Service | ** |
| Project Implementation Specialist | ** |
| Port Information System | ** |
| Project Implementation Schedule | ** |
| Protective Instrument System | ** |
| Patent Information Service | * |
| Product Information System | * |
| Property Information Sheet | * |
| Public Intelligence Service | * |
| Participant Information System | * |
| Photoreceptor Inner Segment | * |
| Premium Internetwork Services | * |
| Perturbed Iterative Scheme | * |
| Premium Information Service | * |
| Professional Informatics Societies | * |
| Parallel Instruction Set | * |
| Pilot Industrial Site | * |
| Plant Irrigation Service | * |
| Policyholder Information Statement | * |
| Prague Info Service | * |
| Property Information System | * |
| Public Interest Section | * |
| Penning trap Ionization Spectroscopy | * |
| Planning Information Systems | * |
| Pratt Institute School | * |
| Perennial and Intermittent Streams | * |
| Physician Information System | * |
| Project Information Services | * |
| Pacific Institute in Seattle | * |
| Pacific Internet Services | * |
| Painting Inspiration Station | * |
| Pakistani and Indian Singles | * |
| Pandion Information Service | * |
| Paragon Information Systems | * |
| Parallex Internet Services | * |
| Park Illinois Sun | * |
| Parrot Island Store | * |
| Perennial or Intermittent Streams | * |
| Peripheral Installation Support | * |
| Permit Identification Sign | * |
| Permit Identification Signs | * |
| Perth Internet Services | * |
| Petrology Isotopic Studies | * |
| Photo Information Service | * |
| Physics Information Server | * |
| Physics Information Service | * |
| Pinetree Independent School | * |
| Planigale Ingrami Subtilissima | * |
| Plant Instrumentation Surveillance | * |
| Playfully Index to the Stars | * |
| Polar Information Sources | * |
| Policom Information Server | * |
| Port Information Services | * |
| Pose et Installation de SystFmes | * |
| Potentially Impacted Surface | * |
| Precise Insurance Services | * |
| Premier Insurance Solutions | * |
| Primarily Interested in Studying | * |
| Professor Imbalzano Sindone | * |
| Programs in Information Science | * |
| Prophet Information Services | * |
| Prototype engineering Information System | * |