- Cabinets & Cabinet Hardware, Durham
- Campgrounds, Durham
- Carbon & Graphite Products Manufacturers, Durham
- Carpenters, Durham - Carpentry Contractors
- Carpentry Framing Contractors, Durham - House Framing - Install & Repair
- Carpet Rug & Upholstery Cleaners, Durham
- Casual Dining Restaurants, Durham
- Caterers Food Services, Durham
- Catholic Churches, Durham
- Ceiling Materials, Durham
- Central American Restaurants, Durham
- Chemical Product Manufacturers, Durham
- Chemicals & Related Products, Durham
- Child Care & Day Care Services, Durham
- Chiropractor, Durham
- City & County Government, Durham
- Cleaning & Maintenance Services, Durham
- Clothing & Accessories Resale & Consignment Shops, Durham
- Coaching Business & Personal, Durham
- Coffee, Durham
- Coffee, Espresso & Tea House Restaurants, Durham
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- Combustibles & Explosives, Durham
- Comic Book Stores, Durham
- Commercial Equipment, Durham
- Communications Services, Durham
- Community Services, Durham
- Concrete Contractors, Durham - Concrete Construction & Concrete Companies
- Construction, Durham
- Construction Companies, Durham
- Construction Equipment & Supplies, Durham
- Construction Equipment Rental & Leasing, Durham
- Consultants & Services, Durham
- Contact Lenses, Durham
- Contractors Supplies & Equipment, Durham
- Convenience Stores, Durham
- Cooking, Food & Beverage Equipment, Durham
- Copying & Duplicating Services, Durham
- Counseling Services, Durham
- Crop Planting & Protecting, Durham - Soil Preparation & Cultivating
- Curtains, Drapes & Window Treatments and Coverings, Durham - Drapery & Upholstery Fabric Stores
- Custom Parts & Accessories, Durham
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