| 6420 | Cable distribution | |
| 4530 | Cable heating (electric wall panel, floor), installation | |
| 4520 | Cable installation (hydro, telephone, telegraph, underground and marine) | |
| 4520 | Cable laying, communication | |
| 6021 | Cable lifts, amusement or scenic, operated separately from lodges | |
| 9213 | Cable program broadcasting | |
| 6420 | Cable program distribution operator | |
| 2023 | Cable reels, wood, manufacturing | |
| 2893 | Cable splicers, handtool, manufacturing | |
| 4520 | Cable splicing service, non-electrical, contractors | |
| 4530 | Cable splicing, electrical, contractors | |
| 4530 | Cable television hookup, contractors | |
| 4520 | Cable television line construction, contractors | |
| 9213 | Cable television network | |
| 6420 | Cable television services | |
| 3220 | Cable television transmission and receiving equipment, manufacturing | |
| 3312 | Cable testing machines, manufacturing | |
| 5150 | Cable, insulated, wholesale | |
| 2899 | Cable, iron or steel, electric, made in wire drawing plants | |
| 2899 | Cable, iron or steel, insulated or armoured, made in wire drawing plants | |
| 3130 | Cable, nonferrous, bare, insulated, or armored, mfpm, manufacturing | |
| 2899 | Cable, non-insulated wire, made from purchased wire | |
| 5142 | Cable, wire (except insulated), wholesale | |
| 4530 | Cablevision installer | |
| 6420 | Cablevision services | |
| 2921 | Cabs for agricultural machinery, manufacturing | |
| 2924 | Cabs for construction machinery, manufacturing | |
| 2915 | Cabs for industrial trucks and tractors, manufacturing | |
| 6022 | Cabs, horse drawn, sightseeing | |
| 1543 | Cacao beans, shelling, roasting and grinding | |
| 7210 | CAD/CAM systems services | |
| 7421 | Cadastral surveying services | |
| 3693 | Caddy carts, manufacturing | |
| 2720 | Cadmium smelting and primary refining | |
| 7210 | CAE (computer-aided engineering) systems services | |
| 5520 | Cafe bar | |
| 5520 | Cafes | |
| 5520 | Cafeteria (food service) | |
| 5150 | Cafeteria furniture, wholesale | |
| 5520 | Cafeteria, personnel | |