| 2610 | Fibres, glass, textile, made in glass making plants | |
| 3720 | Fibres, textile, recovery from textile mill waste and rags | |
| 5121 | Fibres, vegetable, wholesale | |
| 2221 | Fiction books, printing without publishing | |
| 2211 | Fiction books, publishers | |
| 2211 | Fiction books, publishing | |
| 2211 | Fiction books, publishing and printing combined | |
| 5139 | Fiction books, wholesale | |
| 6603 | Fidelity insurance | |
| 7020 | Fiduciaries, real estate | |
| 6719 | Fiduciary agencies (except real estate) | |
| 2927 | Field artillery, manufacturing | |
| 0111 | Field bean (dry) growing | |
| 0111 | Field crop combination farm (except grain and oil seeds) | |
| 5121 | Field crop seeds, wholesale | |
| 1810 | Field jackets, military, men's and boys', cut and sewn from purchased fabric | |
| 0112 | Field nurseries (i.e., growing of flowers and shrubbery) | |
| 0111 | Field pea (dry) growing | |
| 5121 | Field seed, wholesale | |
| 5139 | Field sports equipment, wholesale | |
| 4520 | Field stone, installation | |
| 3312 | Field strength and intensity measuring equipment, electrical, manufacturing | |
| 3430 | Fifth wheel assemblies, manufacturing | |
| 0113 | Fig orchards and farms | |
| 9241 | Figure skaters, independent | |
| 3699 | Figures (marking devices), metal, manufacturing | |
| 3150 | Filament lamps, incandescent, electric, manufacturing | |
| 2430 | Filament yarn, man-made, manufacturing | |
| 3150 | Filaments, for electric lamps, manufacturing | |
| 0113 | Filbert groves and farms | |
| 0140 | Filbert hulling and shelling (fee or contract basis) | |
| 0140 | Filbert hulling and shelling service | |
| 0113 | Filberts farming | |
| 5139 | File cards, wholesale | |
| 2109 | File folders (e.g., accordion, expanding, hanging, manila), made from purchased paper or paperboard | |
| 5139 | File folders, tabs and accessories, wholesale | |
| 2109 | File separators and dividers, die-cut, made from purchased paper or paperboard | |
| 2893 | Files (i.e., machine tool accessory), manufacturing | |
| 2893 | Files and rasps, hand held, manufacturing | |
| 3610 | Filing boxes, cabinets and cases, wood office, manufacturing | |