Companies catalogue
- O.G.S.M. Ltd, Ottawa
- OBS Cellular Linx, Gatineau
- OC Transpo, Ottawa
- ODLL Informatique Inc, Gatineau
- ONYX Community Services, Ottawa
- OTG Construction, Ottawa
- Office Equipment Specialists, Ottawa
- Old Town Hall, Winchester
- Old Town Hall Community Centre, Ottawa
- Olde Forge Community Resource Centre, Ottawa
- Olympia Homes, Carleton Place
- One Up Cocktail Pub, Ottawa
- Ordinateur 911, Gatineau
- Orléans-Cumberland Community Resource Centre, Ottawa
- Osgoode Centennial Ctr Community, Ottawa
- Ottawa Beavers-Banshees Rugby Football Club, Ottawa
- Ottawa Capital Management Corporation, Ottawa
- Ottawa Carleton Ultimate Association, Ottawa
- Ottawa Centretown Toastmasters, Ottawa
- Ottawa College of Homeopathy, Ottawa
- Ottawa Commercial Refrigeration Service, Ottawa
- Ottawa Conference and Event Centre, Ottawa
- Ottawa Driving School Inc, Ottawa
- Ottawa Driving School Inc, Ottawa
- Ottawa Driving School Inc, Ottawa
- Ottawa Energetic Movers, Ottawa
- Ottawa Film Office, Ottawa
- Ottawa Home Real Estate Team w/Keller Williams Solid Rock Realty, Ottawa
- Ottawa House & Condo Group at RE/MAX Core Realty Inc., Ottawa
- Ottawa Jewish Community School, Ottawa
- Ottawa Lettershop Svc, Ottawa
- Ottawa Living, Ottawa
- Ottawa Mortgages - SJC Financial, Ottawa
- Ottawa Paramedic Service, Ottawa
- Ottawa Regional Cancer Foundation - Maplesoft Centre, Ottawa
- Ottawa Sign Language Congregation, Ottawa
- Ottawa Sooners Football Club, Ottawa
- Ottawa South Community Centre, Ottawa
- Ottawa South Conservative Association, Ottawa
- Ottawa Turkish Festival, Ottawa
- Ottawa Tutoring, Ottawa
- Ottawa Valley Meats, Ottawa
- Oueis Dentistry - Carling Dental, Ottawa
- Our Lady Of The Fields Recreation Center, Ottawa
- Overbrook Community Centre, Ottawa
- Overcoming Dyslexia, Ottawa
- Oxygen Entertainment Group, Ottawa
- Oz Kafe, ByWard Market, Ottawa
- OzTREKK, Perth