| Coffee & Tea Shops | 183 |
| Coffee Break Service & Supplies | 183 |
| Coffee Houses | 183 |
| Coils-Electric | 183 |
| Coin Dealers, Supplies, Etc. | 183 |
| Collectibles | 183 |
| Collection Agencies | 183 |
| Columns | 184 |
| Comic Books | 184 |
| Commissary Contractors | 184 |
| Communication Service | 184 |
| Communications Consultants | 184 |
| Community Organizations | 184 |
| Compactors-Waste-Industrial & Commercial | 184 |
| Compactors-Waste-Service & Repair | 184 |
| Compressors-Air & Gas | 184 |
| Compressors-Air & Gas-Renting | 184 |
| Compressors-Air & Gas-Repairing | 184 |
| Computer Graphics | 184 |
| Computer-Dealers | 184 |
| Computer Printers-Service & Repair | 185 |
| Computer Rooms- Installation & Equipment | 185 |
| Computers Networking | 185 |
| Computers-Cable Installation | 185 |
| Computers-Instruction | 185 |
| Computers-On-Line Services | 185 |
| Computers-Renting & Leasing | 185 |
| Computers-Service & Repair | 186 |
| Computers-Software & Services | 187 |
| Computers-Software & Services- Whsle | 187 |
| Computers-Supplies & Parts | 187 |
| Computers-Support Services | 187 |
| Computers-Systems Designers & Consultants | 187 |
| Computers-Training | 187 |
| Concrete Breaking, Cutting, Sawing, Etc | 187 |
| Concrete Construction Forms & Accessories | 187 |
| Concrete Contractors | 188 |
| Concrete Products | 189 |
| Concrete Pumping Service | 189 |
| Concrete Repairing, Restoration, Sealing & | 189 |
| Cleaning |
| Concrete-Decorative | 189 |
| Concrete-Ready Mixed | 189 |
| Condominiums | 189 |
| Conference Centers | 189 |
| Conference & Seminar Coordinators | 190 |
| Connectors-Electric | 190 |
| Construction Estimates | 190 |
| Construction Management | 190 |
| Construction-Cleaning Services | 190 |
| Consulates & Other Foreign Government | 190 |
| Representatives |
| Consultants | 190 |
| Contact Lenses | 190 |
| Contractors Equipment & Supplies- Dealers & | 191 |
| Service |
| Contractors Equipment & Supplies- Renting & | 191 |
| Leasing |
| Contractors Equipment-Used | 191 |
| Contractors-Fill | 191 |
| Contractors-General | 192 |
| Contractors-Oil Field | 195 |
| Controls, Control Systems & Regulators | 195 |
| Convenience Stores | 195 |
| Convention Services & Facilities | 196 |
| Convents & Monasteries | 196 |
| Cookies & Crackers | 196 |
| Cooking Instruction | 196 |
| Cooling Towers | 196 |