sort by Rank | Alpha
| Possible Meanings | Rank |
| Pine Rivers Aeronautical Model Society | ** |
| Puerto Rico Air Management Services | ** |
| Parent Resource and Mother Support | ** |
| Pregnancy Risk Assesment Monitoring System | ** |
| Protocol Review and Approval Management System | * |
| Pregnancy Risk Assessment Monitoring Systems | * |
| Perinatal Risk Assessment Monitoring System | * |
| Paperwork Reduction Act Management System | * |
| Passenger Reservation and Movement System | * |