- Abortion Providers Referral Services, Sanford - Educational, Referral & Support Service Centers
- Accounting, Auditing & Bookkeeping Services, Sanford
- Additional Educational Opportunities, Sanford
- Administrative Professionals, Sanford
- Advertising, PR & Marketing Services, Sanford
- Agricultural & Geological Engineers, Sanford
- Agricultural Insurance, Sanford
- Agriculture, Sanford
- Aircraft Dealers & Distributors, Sanford
- Alarms, Signaling & Security Equipment & Systems, Sanford
- Ambulance Department, Sanford
- American Legions, Sanford
- American Restaurants, Sanford
- Animals, Sanford
- Antique Appraisers, Sanford
- Apartment Building Operators, Sanford
- Apartments & Buildings, Sanford
- Appraisers, Sanford
- Architects, Sanford - Residential, Interior, Commercial, Office & Landscape Architecture Services
- Armed Forces Recruiting, Sanford
- Arts & Crafts Supplies & Stores, Sanford
- Arts & Culture, Sanford
- Asian Restaurants, Sanford
- Assembly & Fabricating Service , Sanford
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- Assembly Of God Church, Sanford
- Astrologers & Psychic Consultant, Etc, Sanford - Psychics & Mediums
- Athletic Equipment Rental, Sanford
- Athletic Equipment Repair & Service, Sanford
- Athletic Facilities & Services, Sanford
- Attorneys & Lawyers, Sanford
- Attorneys & Lawyers, Sanford
- ATV & RV Dealers, Sanford - All-Terrain & Recreational Vehicles
- Auctioneers, Sanford
- Auctions, Sanford - Auctioneer Services
- Audiologists, Sanford - Audiology Doctors, Physicians & Surgeons
- Auto Air Conditioning Repair, Parts, Equipment & Service, Sanford
- Auto Body Repair & Paint Shop, Sanford - Auto Body Shop
- Auto Customizing, Sanford
- Auto Driving Schools, Sanford
- Auto Paint, Lettering & Striping Services, Sanford
- Auto Parts, Accessories, Equipment & Supplies, Sanford
- Auto Radio & Stereo - Sales & Service, Sanford - Car Stereo, Radio, Speaker, Amplifier, Subwoofer, etc
- Auto Repair Shops & Maintenance Service, Sanford - Auto Mechanic & Car Repair Shops
- Auto Restoration - Antique, Sports & Classic Car, Sanford
- Auto Services, Sanford
- Automation Systems & Equipment, Sanford - Industrial Automation
- Aviation & Avionics Sales, Sanford
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