sort by Rank | Alpha
| Possible Meanings | Rank |
| Remote Control and Supervision | *** |
| Remote Computer Access Software | *** |
| Rogers City Area Schools | *** |
| Rapid City Area Schools | *** |
| Risk Consulting and Advisory Services | *** |
| Research Center for Applied Sciences | *** |
| Rapid Case Ascertainment System | *** |
| Royal Canadian Astronomical Society | *** |
| Right Coronary Artery System | *** |
| Reserve Component Automated System | *** |
| Recurrent carotid artery stenosis | ** |
| replication competent avian retroviruses | ** |
| Redland and Cotham Amenities Society | ** |
| Religious Coping Activities Scale | ** |
| Railway Collision Avoidance System | ** |
| Randolph County Animal Shelter | ** |
| Rutland County Audubon Society | ** |
| Robert Cooper Audubon Society | ** |
| Roller Coaster Appreciation Society | ** |
| Redland Cotham Amenities Society | ** |
| Research Centre in Applied Sciences | ** |
| Rotherham Community Alcohol Service | ** |
| Russian Chamber Art Society | ** |
| Replication Competent Avian Sarcoma | ** |
| Richmond Community Access Society | ** |
| Residential Conservation Assistance Services | ** |
| Royal Canadian Artillery School | ** |
| Raleigh County Animal Shelter | ** |
| Replication Competent ALV Splice | ** |
| Revolutionary Confederation of Anarcho Syndicalists | ** |
| Reserve Component Automation Systems | ** |
| Richardson Civic Art Society | ** |
| Receptor Cofactor Assay System | ** |
| Replication Competent Avian Splice | ** |
| Reserve Component Automated Sytem | ** |
| Rotorcraft Comprehensive Analysis System | ** |
| Rural Childhood Asthma Study | ** |
| r c achievement scheme | * |
| Registered Corrective Action Specialist | * |
| Research Center Administrators Society | * |
| Richardson Civic Arts Society | * |
| Rinku Contemporary Art Space | * |
| Royal Crown Academic School | * |
| Regulatory Compliance Advisory Services | * |
| Reports of Changes in Asthma Symptoms | * |
| Research Center Administrator Society | * |
| Research Centre for American Studies | * |
| Rogers City Area Seniors | * |
| Residential Care Accreditation Scheme | * |
| River Cities Anthropological Society | * |
| Role Conflict and Ambiguity Scale | * |
| Regional Crime Analysis System | * |
| Research and Creative Activity Subcommittee | * |
| Reserve Component Automation System (Army) | * |
| Reserve Componets Automated System | * |
| Rutgers Citizenship And Service | * |