- Obstetricians & Gynecologists, Jeffersonville - Ob-Gyn Doctors, Physicians & Surgeons (Obstetrics & Gynecology)
- Office Supplies, Equipment & Office Furniture Stores, Jeffersonville
- Oil & Gas Companies, Jeffersonville
- Oil & Petroleum Products, Jeffersonville - Merchant, Wholesalers, etc
- Oil Change & Lubrication, Jeffersonville - Auto Oil & Quick Lube
- Oil Industry & Oil Field Equipment & Services, Jeffersonville - Oil Companies
- Oils Industrial, Jeffersonville
- Oncologists, Jeffersonville - Cancer Doctors, Physicians & Surgeons (Oncology)
- Ophthalmologists, Jeffersonville - Eye Doctors, Physicians & Surgeons (Ophthalmology)
- Optical Stores - Eyeglasses, Lenses & Sunglasses, Jeffersonville
- Optometrists, Jeffersonville - Eye Doctors, Physicians & Surgeons (Optometry)
- Ornamental Nursery, Jeffersonville
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- Ornamental Nursery Products, Jeffersonville
- Ornamental Nursery Services, Jeffersonville
- Orthopedic Appliances Manufacturers, Jeffersonville
- Orthopedists, Jeffersonville - Orthopedic Surgery Doctors, Physicians & Surgeons
- Other Building Materials & Supplies, Jeffersonville
- Other Industrial Goods, Jeffersonville
- Other Lodging, Jeffersonville
- Outdoor Equipment & Accessories, Jeffersonville
- Outpatient Services, Jeffersonville - Outpatient Care
- Ownership Organizations, Jeffersonville
- Oxygen & Respiratory Equipment & Supplies, Jeffersonville - Oxygen Concentrator, Tank, Machine, etc
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