| 5150 | Ball, rod and pebble mill machinery, wholesale | |
| 3110 | Ballasts and transformers, lighting fixture, manufacturing | |
| 3110 | Ballasts for lighting fixtures, manufacturing | |
| 9214 | Ballet companies | |
| 9214 | Ballet dancers, independent | |
| 9214 | Ballet productions, live | |
| 8090 | Ballet schools | |
| 1920 | Ballet slippers, manufacturing | |
| 5239 | Balloon shops, retail | |
| 9309 | Balloon-o-gram, service | |
| 3530 | Balloons, hot air, manufacturing | |
| 2520 | Balloons, plastics, manufacturing | |
| 2519 | Balloons, rubber, manufacturing | |
| 9219 | Ballrooms | |
| 3693 | Balls (i.e., baseball, basketball, football, golf, tennis, pool and bowling), manufacturing | |
| 3693 | Balls, rubber (except athletic equipment), manufacturing | |
| 2710 | Balls, steel, made in steel mills | |
| 0200 | Balsam needles, gathering of | |
| 2029 | Bamboo awnings, manufacturing | |
| 5139 | Bamboo furniture, wholesale | |
| 2029 | Bamboo shades and blinds, manufacturing | |
| 0113 | Banana farming | |
| 5122 | Banana ripening for the trade, wholesale | |
| 7511 | Band council, Indian | |
| 2893 | Band saw blades, all types, manufacturing | |
| 1810 | Band uniforms, cut and sewn from purchased fabric | |
| 2423 | Bandages and dressings, surgical and orthopedic, manufacturing | |
| 5139 | Bandages, dressings and gauzes, wholesale | |
| 2423 | Bandages, plastics, muslin and plaster of paris, manufacturing | |
| 5139 | Bandages, wholesale | |
| 1810 | Bandeaux (i.e., brassiere), women's, misses' and girls', cut and sewn from purchased fabric | |
| 9214 | Bands, dance | |
| 9214 | Bands, musical | |
| 2922 | Bandsaws, woodworking type, manufacturing | |
| 3692 | Banjos and parts, manufacturing | |
| 3312 | Bank and turn indicators and components (aeronautical instruments), manufacturing | |
| 6519 | Bank branches, chartered, providing corporate and institutional banking services | |
| 6519 | Bank branches, chartered, providing personal and commercial banking services | |
| 4520 | Bank building construction, general contractors | |
| 7010 | Bank buildings, operation of | |