| Regional Atmospheric Modeling System | Academic & Science |
| Reliability And Maintainability Symposium | Academic & Science |
| Road Assets Management System | Academic & Science |
| Risk Analysis And Management System | Business |
| Roofing Asset Management Systems | Business |
| Radio Audience Measurement Survey | Community |
| Rockin Against Multiple Sclerosis | Community |
| Range Association of Municipalities and Schools | Community |
| Responsibility And Management Skills | Community |
| Resource Allocation and Multi Project Scheduling | Computing |
| Reliability, Availability, Maintainability, and Supportability | Electronics |
| Risk Assessment and Method Statement | General |
| Reliability Availability Maintainability and Safety | General |
| Relocatable Air Monitoring System | General |
| Richmond Area Multi Services | General |
| Rate Analysis Mada Simple | General |
| Reliability Availability Maintainability Safety | General |
| Revive Accelerate Manage sustain | General |
| Radical Acts of Mercy and Service | General |
| Respectful Accountable Mindful Safe | General |
| Risk Assessment Method Statements | General |
| Road Asset Management System | General |
| Risk Assessment Method Statement | General |
| Responsible Attentive Motivated and Safe | General |
| Roadmaster Active Suspension System | Governmental |
| Royal Army Medical Service | Governmental |
| Rocking Against Multiple Sclerosis | Medical |
| Russian Academy of Medical Sciences | Medical |
| Representative Association of Medical Schemes | Medical |
| Risk Assessment & Method Statements | Messaging |
| Risk Assessments and Method Statements | Messaging |
| Remote Activation Munitions System | Military and Defence |
| Remote Agent Master Server | Networking |
| Rebuildable Action Model System | Softwares |
| Registered Australian Mortgage Securities | Stock Exchange |