- Optometrist
- Office equipment rental service
- Orthotics & prosthetics service
- Outerwear store
- Oil & natural gas company
- Oriental medicine clinic
- Occupational health service
- Organic restaurant
- Outlet store
- Off roading area
- Office supply store
- Optical products manufacturer
- Outdoor sports store
- Orthoptist
- Office equipment supplier
- Orphanage
- Office furniture store
- Orthopedic clinic
- Orthodox church
- Observation deck