sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Russian Outsourcing and Software Summit | **** |
| Research Opportunities in Space Science | **** |
| Resident Opportunity and Self Sufficiency | *** |
| Resident Opportunities and Self Sufficiency | *** |
| Resident Opportunity and Supportive Services | *** |
| REM Optical Slitless Spectrograph | *** |
| Resource Ordering and Statusing System | *** |
| Reflective Online Searching Skills | *** |
| Registry of Scripless Securities | *** |
| Regional Off Street System | ** |
| Rostra Obstacle Sensing System | ** |
| Rating of Self Status | ** |
| Responsive on Site Solutions | ** |
| Repetitive Oral Suction Swallow test | ** |
| Resident Opportunity Self Sufficiency | ** |
| Regional Open Space System | ** |
| Remote Operations Support System | ** |
| Resource Order and Status System | ** |
| Run Out Skagit Spoilers | ** |
| Resident Opportunities for Self Sufficiency | ** |
| Resident Opportunity for Self Sufficiency | ** |
| Resources Organization and Searching Specification | ** |
| Reconnaissance Offshore Sand Search | ** |
| Retail Outlet Service System | ** |
| Review of Site Security | ** |
| Research Operations Support Services | * |
| Remote Operating Sub System | * |
| Resident Outdoor Science School | * |
| Residential Outdoor Science Schools | * |
| Reusable Operating System Software | * |
| Release and Operations Service System | * |
| Reconstruction Of Serial Sections | * |