- Cafe Restaurants, Jamestown
- Casual Dining Restaurants, Jamestown
- Caterers Food Services, Jamestown
- Cellular & Mobile Phone Service, Jamestown
- Chambers Of Commerce, Jamestown
- Chemical Compounds, Jamestown
- Chemicals & Related Products, Jamestown
- Child Care & Day Care Services, Jamestown
- Chinese Restaurants, Jamestown
- City & County Government, Jamestown
- Commercial Equipment, Jamestown
- Commercial Printing Manufacturers, Jamestown
- Communications Services, Jamestown
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- Community Services, Jamestown
- Computer & Laptop Repair, Jamestown - PC Repair Services
- Computer Networks, Jamestown - Design & Systems
- Computer Repair, Jamestown
- Computers Disaster Recovery Services, Jamestown
- Construction, Jamestown
- Construction & Civil Engineer, Jamestown
- Consultants & Services, Jamestown
- Convenience Stores, Jamestown
- Convents & Monasteries, Jamestown
- Cooking, Food & Beverage Equipment, Jamestown
- Craft Supplies, Jamestown - Hobby & Craft Stores
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