- Cabinets & Cabinet Hardware, San Juan
- Cafe Restaurants, San Juan
- Cakes, Pies, & Pastries, San Juan
- Campgrounds, San Juan
- Car Alarms & Security Systems, San Juan - Remote Car Starter, etc
- Car Detailing & Wash Service, San Juan - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, San Juan
- Cars, Truck, Van & SUV Car Dealerships, San Juan - Auto Dealers
- Cash Registers & Supplies, San Juan
- Casual Dining Restaurants, San Juan
- Catholic Churches, San Juan
- Cellular & Mobile Phone Equipment & Systems Installation, Repair & Service, San Juan
- Cellular & Mobile Phone Service, San Juan
- Central American Restaurants, San Juan
- Chicken Restaurants, San Juan
- Child Care & Day Care Services, San Juan
- Churches 1 Of 3, San Juan
- Churches 2 Of 3, San Juan
- City & County Government, San Juan
- Clinics, San Juan
- Clothing Stores, San Juan - Clothes & Accessories
- Coaching Business & Personal, San Juan
- Commercial Equipment, San Juan
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- Commercial Printing, San Juan
- Commercial Printing Manufacturers, San Juan
- Commodity & Merchandise Storage & Warehouse, San Juan - Warehousing
- Communications Services, San Juan
- Community Services, San Juan
- Computer & Laptop Repair, San Juan - PC Repair Services
- Computer Repair, San Juan
- Concrete, San Juan - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, San Juan
- Concrete Product Manufacturers, San Juan
- Condiments & Sauces, San Juan
- Construction, San Juan
- Construction Services, San Juan
- Consultants & Services, San Juan
- Contractor Equipment & Supplies, San Juan - Construction Equipment & Machinery
- Convalescent Homes Placement Services, San Juan - Convalescent Care
- Convenience Stores, San Juan
- Convention & Meeting Facilities, San Juan - Meeting Rooms
- Cooking, Food & Beverage Equipment, San Juan
- Cosmetics, Toiletries, Perfumes & Beauty Supply Stores, San Juan
- Counseling Services, San Juan
- Cut Stone & Stone Products Manufacturers, San Juan
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