sort by Rank | Alpha
| Possible Meanings | Rank |
| Possible Source of Contamination | **** |
| Pakistan State Oil Company | **** |
| Promo Stamp on Cover | *** |
| Paralegal Society of Canada | *** |
| Power Supply on Chip | *** |
| Parenting Sense of Competence | *** |
| papillary serous ovarian cancer | ** |
| papillary serous ovarian carcinomas | ** |
| Psychological Sense of Community | ** |
| Potential Sources of Contamination | ** |
| Please Save Our Children | ** |
| Public Safety Oversight Committee | ** |
| Penn State Objectivist Club | ** |
| Puget Sound Oncology Consortium | ** |
| Potential Species of Concern | ** |
| Potential Source of Contamination | ** |
| Parental Sense of Competence | ** |
| Parent Sense of Competence | ** |
| Photographic Society of Orange County | ** |
| Provincial Sport Organizations Council | ** |
| Phoenix Science Operations Center | ** |
| Programmable Solution on Chip | ** |
| Penn State Outing Club | ** |
| Project Save Our Children | ** |
| Public Safety Operations Center | ** |
| Palmetto Ski Outing Club | ** |
| Parent Share of Cost | ** |
| Philanthropic Society of the Orthodox Church | ** |
| Power System Operations Committee | ** |
| Photonic System on Chip | ** |
| Professional Servicers Organization of California | ** |
| Papillary Serous Ovarian Carcinoma | ** |
| Patient Safety Oversight Committee | ** |
| Palmetto Ski and Outing Club | ** |
| Principal Supply Officers Committee | ** |
| Providence Society for Organizing Charity | ** |
| Parenting Sense of Competency | * |
| Port Security Operations Center | * |
| Pressure Sensitive Optically Clear | * |
| Pakistan State Oil Corporation | * |
| Performance and Scrutiny Overview Committee | * |
| Philippine Standard Occupational Classification | * |
| promo sticker on cover | * |
| Protective Services Operations Committee | * |
| Public Service Official Circular | * |
| Pharmacists Society of Orange County | * |
| Political Scientists of Color | * |
| Praktikum System on Chip | * |
| Probabilistic System on Chip | * |
| Programmable Systems on Chip | * |
| Particularized Statement of Claim | * |
| Pheasant Stamp Oversight Committee | * |
| Philippine Standard Occupation Classification | * |
| Power System Operation Committee | * |
| Pakistan Shell Oil Company | * |
| Problems for the Software Community | * |
| Pacific Symphony Orchestra Computer | * |