| 4510 | Demolition contractor | |
| 4510 | Demolition of buildings or other structures (except marine), contractors | |
| 7499 | Demonstration services, merchandise | |
| 3420 | Demountable cargo containers, manufacturing | |
| 1551 | Denatured alcohol, manufacturing | |
| 1711 | Denim fabrics, broad-woven, weaving | |
| 2021 | Densified wood, manufacturing | |
| 3312 | Densitometers, laboratory analytical, manufacturing | |
| 3312 | Densitometers, manufacturing | |
| 3313 | Density and specific gravity instruments, industrial process type, manufacturing | |
| 2423 | Dental alloys for amalgams, manufacturing | |
| 3311 | Dental cabinets, manufacturing | |
| 5139 | Dental care preparations, wholesale | |
| 3311 | Dental chairs, manufacturing | |
| 8512 | Dental clinic | |
| 3311 | Dental equipment and instruments, manufacturing | |
| 5150 | Dental equipment, wholesale | |
| 9112 | Dental examining board (national) | |
| 2423 | Dental fitting materials, manufacturing | |
| 2424 | Dental floss, manufacturing | |
| 2423 | Dental glues and cements, manufacturing | |
| 3311 | Dental hand instruments (e.g., forceps), manufacturing | |
| 7512 | Dental health programs (except insurance), provincial administration | |
| 8512 | Dental health services, general practice | |
| 8512 | Dental health services, specialist | |
| 8519 | Dental hygienists, offices of | |
| 2423 | Dental impression compounds, manufacturing | |
| 3311 | Dental instrument delivery systems, manufacturing | |
| 3311 | Dental instrument repair | |
| 6603 | Dental insurance carriers, direct | |
| 3311 | Dental laboratories | |
| 8519 | Dental laboratories, X-ray | |
| 3311 | Dental laboratory equipment, manufacturing | |
| 5150 | Dental laboratory equipment, wholesale | |
| 8519 | Dental laboratory, analysis and diagnostic | |
| 2423 | Dental metal (gold, silver and platinum) | |
| 2423 | Dental metal, manufacturing | |
| 2423 | Dental plasters and compounds, manufacturing | |
| 7310 | Dental research and development laboratories | |
| 8512 | Dental surgeons' offices of | |