- Office Supplies, Equipment & Office Furniture Stores, Berryville
- Oil & Gas Producers, Berryville - Companies
- Oil Change & Lubrication, Berryville - Auto Oil & Quick Lube
- Ophthalmologists, Berryville - Eye Doctors, Physicians & Surgeons (Ophthalmology)
- Optical Stores - Eyeglasses, Lenses & Sunglasses, Berryville
- Opticians, Berryville
- Optometrists, Berryville - Eye Doctors, Physicians & Surgeons (Optometry)
- Optometry Clinics, Berryville - Eye Clinics
- Ornamental Nursery, Berryville
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- Ornamental Nursery Services, Berryville
- Orthodontist, Berryville - Teeth Straightening, Invisalign & Dental Braces
- Orthopedists, Berryville - Orthopedic Surgery Doctors, Physicians & Surgeons
- Other Building Materials & Supplies, Berryville
- Outboard Motors Parts & Repair, Berryville
- Outdoor & Lawn & Garden Equipment Repair & Service, Berryville
- Outdoor Advertising & Billboard, Berryville
- Outdoor Man Made & Natural Recreation Facilities, Berryville
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