- Cable TV Companies & Services, Oakland
- Carpenters, Oakland - Carpentry Contractors
- Carports & Supplies, Oakland - Steel, Portable, Wood, Canvas & Metal Carports
- Cars, Truck, Van & SUV Car Dealerships, Oakland - Auto Dealers
- Castings Industrial, Oakland
- Child Care & Day Care Services, Oakland
- Churches 1 Of 3, Oakland
- Citrus Broker & Buyers, Oakland
- Citrus Grove Services, Oakland
- City & County Government, Oakland
- Clinics, Oakland
- Communications Services, Oakland
- Community & Recreational Facilities, Oakland
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- Community Church, Oakland
- Community Churches, Oakland
- Community Services, Oakland
- Computer & Software Stores, Oakland
- Computer Repair, Oakland
- Computer Software & Services, Oakland
- Computer Software Service, Oakland
- Construction, Oakland
- Construction & Civil Engineer, Oakland
- Consultants & Services, Oakland
- Convenience Stores, Oakland
- Counseling Professionals, Oakland
- Counseling Services, Oakland
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