sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| American Sand Racing Organization | ** |
| Aboa Space Research Oy | ** |
| ASTRO School of Radiation Oncology | ** |
| Arab States Regional Office | ** |
| Atlanta Singles Running Organization | ** |
| American Spinal Research Organization | ** |
| Association of Social Research Organisations | * |
| Association of Surf Riding Officials | * |
| Astro Science Research Organization | * |