sort by Rank | Alpha
| Possible Meanings | Rank |
| Alliance of Residents Concerning O | **** |
| AIDS Resource Center Ohio | *** |
| Accounting and Reporting Console | *** |
| Aboriginal Recruitment Coordination Office | *** |
| And the Royal College of Organists | *** |
| Augmented Representation of Cultural Objects | *** |
| Autosomal Recessive Cardiomyopathy, Ophthalmoplegia | ** |
| Association of Recording Copyright Owners | ** |
| Association Research Circulation Osseous | ** |
| Association of Retired Commissioned Officers | ** |
| American Radio Chamber Orchestra | ** |
| Arran Recycling Community Organisation | ** |
| Anti Racism Contact Officer | ** |
| Autosomal Recessive Cardiomyopathy Ophthalmoplegia | ** |
| Advanced Research in Combinatorial Optimization | ** |
| Associate Royal College of Organists | * |
| Alliance of Rosemont Community Organizations | * |
| Applied Research in Combinatorial Optimization | * |
| Advanced Read Channel Optimization | * |
| Artist Run Centres Ontario | * |
| Asociaciones Regionales de Caficultores Organizados | * |