| 8090 | Hairdressing school | |
| 5139 | Hairpieces, wholesale | |
| 3699 | Hairpin mountings, manufacturing | |
| 3699 | Hairpins (except rubber), manufacturing | |
| 3699 | Hairpins, manufacturing | |
| 2519 | Hairpins, rubber, manufacturing | |
| 2899 | Hairsprings (except clock and watch), manufacturing | |
| 8531 | Half way houses | |
| 8531 | Halfway group homes for persons with social or personal problems | |
| 8531 | Halfway homes for delinquents and offenders | |
| 7010 | Hall and banquet room, rental | |
| 3210 | Hall effect devices, manufacturing | |
| 3610 | Hall furniture, household, wooden, manufacturing | |
| 1810 | Halloween costumes, cut and sewn from purchased fabric | |
| 7010 | Halls, reception, rental | |
| 3150 | Halogen bulbs, manufacturing | |
| 2411 | Halogenated aromatic hydrocarbon derivatives, manufacturing | |
| 2411 | Halogenated hydrocarbon (except aromatics) derivatives, manufacturing | |
| 1543 | Halvah, manufacturing | |
| 1511 | Ham, canned, made from purchased meat | |
| 1511 | Ham, poultry, manufacturing | |
| 1511 | Ham, preserved (except poultry), made from purchased meat | |
| 5520 | Hamburger stand | |
| 2891 | Hammer forgings, unfinished, made from purchased iron or steel | |
| 2924 | Hammer mill machinery (i.e., rock and ore crushing machines), stationary, manufacturing | |
| 2924 | Hammer mills (i.e., rock and ore crushing machines), portable, manufacturing | |
| 2893 | Hammers, handtools, manufacturing | |
| 2029 | Hammers, meat, wood, manufacturing | |
| 3692 | Hammers, piano, manufacturing | |
| 2922 | Hammers, pneumatic, hand-operated, manufacturing | |
| 1721 | Hammocks, fabric, manufacturing | |
| 3610 | Hammocks, metal or fabric and metal combination, manufacturing | |
| 2023 | Hampers, fruit and vegetable, veneer and splint, manufacturing | |
| 3610 | Hampers, laundry (except metal), manufacturing | |
| 2520 | Hampers, laundry, plastics, manufacturing | |
| 3610 | Hampers, laundry, rattan, reed, splint, veneer and willow, manufacturing | |
| 2899 | Hampers, laundry, sheet metal, manufacturing | |
| 1511 | Hams (except poultry), produced in slaughtering plants | |
| 0122 | Hamsters, raising | |
| 2610 | Hand blowing purchased glass | |