sort by Rank | Alpha
| Possible Meanings | Rank |
| Reduction in Cross Sectional Area | **** |
| Regional Center for Southern Africa | **** |
| Regulations of Connecticut State Agencies | *** |
| Reformed Church in South Africa | *** |
| Rose City Softball Association | *** |
| Reformed Churches of South Africa | *** |
| Research Creative Scholarly Activities | *** |
| Regional Center for South Africa | *** |
| Raleigh Civic Symphony Association | *** |
| Regional Centre for Southern Africa | *** |
| Residual Chemical Shift Anisotropy | ** |
| relative cross-sectional area | ** |
| Resuscitation Council of Southern Africa | ** |
| Rotating Credit and Savings Associations | ** |
| Research Creative Scholarly Activity | ** |
| Rottnest Channel Swim Association | ** |
| Regional Center for South Asia | ** |
| rhinoconjunctivitis and seasonal asthma | ** |
| Regional Cancer Services Alliance | ** |
| Royal College of Science Association | ** |
| Resuscitation Councils of Southern Africa | ** |
| Read Center Student Association | ** |
| Recruiting and Consulting Services Association | ** |
| Recruitment Consulting Services of Australia | ** |
| Robinson College Students Association | ** |
| Rhetoric and Composition Sound Archives | ** |
| Rehabilitative Care Systems of America | ** |
| Respiratory Care Student Association | ** |
| Resuscitation Council of SA | ** |
| Randolph Caldecott Society of America | ** |
| Resuscitation Council of South Africa | ** |
| Recruitment and Consulting Association | ** |
| Recruitment Consulting Services Australia | * |
| Rugby Club Sports Association | * |
| Recruitment Consultants Services Association | * |
| River Corridor Special Area | * |
| Recruitment and Consulting Services of Australia | * |
| Recruitment Consultant Services Association | * |
| Red Crescent Society of Afghanistan | * |
| Recruitment Consultancy Services Association | * |
| Ruth Connell Studio Architects | * |
| Recruitment and Consultancy Services Association | * |
| Recruitment and Consulting Services Australia | * |
| Reformed Church of South Africa | * |
| Request for Corporate Supply Arrangement | * |
| Robinson College Student Association | * |
| Royse City Soccer Association | * |
| Russian Coating Scientific Association | * |
| Report on Connectivity in Saudi Arabia | * |
| Robert and Chenoa Seeking to Ado | * |