- Office building
- Outdoor movie theater
- Office supply wholesaler
- Observation deck
- Oriental medicine store
- Orthodox synagogue
- Orchid grower
- Orthodox church
- Organic drug store
- Orchard
- Oil and gas exploration service
- Office supply
- Open air museum
- Outdoor activity organiser
- Orchestra
- Observatory
- Olive oil cooperative
- Organic farm
- Office services
- Oil wholesaler