| C- | CA | CB | CD | CE | CH | CI | CL | CM | CO | CP | CR | CT | CU | CY |
| Index entry | NAICS Code | U.S. NAICS Title |
|---|---|---|
| CT-SCAN (computer tomography) centers | 621512 | Diagnostic Imaging Centers |
| CT/CAT (computerized axial tomography) scanners manufacturing | 334517 | Irradiation Apparatus Manufacturing |
| C- | CA | CB | CD | CE | CH | CI | CL | CM | CO | CP | CR | CT | CU | CY |