sort by Rank | Alpha
| Possible Meanings | Rank |
| Cessna Owner Organization | **** |
| Commissioners of Oaths | **** |
| Centre for Overweight and Obesity | **** |
| Caltech Optical Observatories | **** |
| Chief operation Officer | **** |
| Creating Original Opera | **** |
| Congress on Optics and Optoelectronics | **** |
| Computer Ondersteund Onderwijs | **** |
| Chief Operating Officers | *** |
| Century Orchestra Osaka | *** |
| Country Operations Officer | *** |
| Chief Operational Officer | *** |
| City of Opelika (Opelika, AL) | *** |
| Coastal Ocean Observatories | *** |
| Conversations on Organisations | *** |
| Completion of Options | *** |
| Certificates of Origin | *** |
| Committee of One | *** |
| chicago operations office | *** |
| Committee on Organization | *** |
| child-onset obese | ** |
| chlorinated olive oil | ** |
| Chief Organization Officer | ** |
| Chairman of Operations | ** |
| corporate operations office | ** |
| Concepts of Operation | ** |
| Chamber Orchestra of the Ozarks | ** |
| Charge of the Operations | ** |
| Canada Organic Office | ** |
| Compliance Officers and Operations | ** |
| Centro Ortopedia Oncologica | ** |
| Competentiegericht Opleiden Op | ** |
| Carleton Ottawa Outaouais | ** |
| California Outreach Office | ** |
| chief operations officers | ** |
| College of Optometrists of Ontario | ** |
| Certificate of Originality | ** |
| Change Over Oscillator | * |
| Change Over Order | * |
| Chief Operation Official | * |
| Central Ohio Orienteering | * |
| Collins on Offering | * |
| Commerce to Obtain | * |
| Cheap Operating Officer | * |
| Combined Obstacle Overlay | * |
| Campus Outreach Opportunity | * |
| Comments Or Objections | * |
| Cargo Operations Officer | * |
| Centro Oftamologico de Occidente | * |
| Chief Opinion Officer | * |
| Complete Ozzy Osbourne | * |
| Cadden Okee the Otter | * |
| Canada Overdrive Online | * |
| Canadian Odysseys Odytours | * |
| Center for Orthopaedic Oncology | * |
| Centro Oftalmol=gico de Occidente | * |
| Cessation Of Operations | * |
| Cessation or Other Order | * |
| Character Of Overburden | * |
| Chief of Operations | * |
| Chukwumeka Odumegwu Ojukwu | * |
| Concept Of Operations | * |
| Consequences Of Operation | * |
| Copies Of Order | * |