- Additional Educational Opportunities, Martinsville
- Agricultural Consultants, Martinsville - Dairy, Farm, Feed, Herbicide, Livestock, Soil, & Crop Consulting Service & More
- Agricultural Services, Martinsville
- Agriculture, Martinsville
- Air Conditioning Repair & Service, Martinsville - HVAC - Cooling & Heating Repair
- Air Duct Cleaning, Martinsville - Heating & Air Conditioning Systems
- Ambulance Department, Martinsville
- American Legions, Martinsville
- Archery Supplies & Equipment Stores, Martinsville - Bows, Arrows, Targets & Accessories
- Architects, Martinsville - Residential, Interior, Commercial, Office & Landscape Architecture Services
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- Aromatherapy & Candle Stores, Martinsville
- Arts & Crafts Supplies & Stores, Martinsville
- Arts & Culture, Martinsville
- ATV & RV Dealers, Martinsville - All-Terrain & Recreational Vehicles
- Auctioneer, Martinsville
- Auto Body Repair & Paint Shop, Martinsville - Auto Body Shop
- Auto Parts, Accessories, Equipment & Supplies, Martinsville
- Auto Repair Shops & Maintenance Service, Martinsville - Auto Mechanic & Car Repair Shops
- Auto Repair Shops - General, Martinsville
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