- Occupational therapist
- Oriental rug store
- Oyster supplier
- Otolaryngology clinic
- Oncologist
- Oriental medicine clinic
- Ophthalmologist
- Off roading area
- Oriental goods store
- Optical products manufacturer
- Orchestra
- Observation deck
- Open university
- Osteopath
- Outdoor bath
- Outboard motor store
- Office services
- Offal pot cooking restaurant
- Outdoor movie theater
- Off-road race track