| 4520 | Bakers' oven construction, general contractors | |
| 1810 | Bakers' service apparel, washable, men' s and boys', cutting and sewing purchased fabric | |
| 1810 | Bakers' service apparel, washable, women's, misses' and girls', cut and sewn from purchased fabric | |
| 5150 | Bakery equipment wholesale | |
| 5259 | Bakery goods (purchased), house-to-house, retail | |
| 2925 | Bakery machinery and equipment, manufacturing | |
| 5150 | Bakery machinery, equipment and supplies, wholesale | |
| 2925 | Bakery ovens, manufacturing | |
| 5220 | Bakery products and bread, retail | |
| 1541 | Bakery products, dry (e.g., biscuits, cookies, crackers), manufacturing | |
| 1541 | Bakery products, fresh (e.g., bread, cakes, doughnuts, pastries), made in commercial bakeries | |
| 1541 | Bakery products, frozen (e.g., cakes, doughnuts, pastries), made in commercial bakeries | |
| 5122 | Bakery products, frozen, wholesale | |
| 1541 | Bakery products, partially cooked, not frozen, made in commercial bakeries | |
| 5520 | Bakery products, selling for immediate consumption | |
| 5122 | Bakery products, wholesale | |
| 1543 | Baking chocolate, made from cacao beans | |
| 1543 | Baking chocolate, made from purchased chocolate | |
| 1549 | Baking powder, manufacturing | |
| 2919 | Balances (except laboratory), manufacturing | |
| 5150 | Balances (except laboratory), wholesale | |
| 3312 | Balances and scales, laboratory type, manufacturing | |
| 3312 | Balancing equipment (except wheels), manufacturing | |
| 3312 | Balancing equipment, motor vehicle wheel, manufacturing | |
| 4540 | Balconies, metal, installation | |
| 4520 | Balconies, precast, concrete, installation | |
| 2811 | Balcony railings, metal, manufacturing | |
| 4540 | Balcony ramps, fibreglass, installation | |
| 2921 | Bale throwers, manufacturing | |
| 2899 | Bale ties, made from purchased wire | |
| 5142 | Bale ties, wire, wholesale | |
| 2921 | Balers, farm (e.g., hay, straw, cotton), manufacturing | |
| 5149 | Baling and grading waste paper | |
| 2919 | Baling machines (e.g., scrap metal, paper), manufacturing | |
| 2913 | Ball bearings and parts (including mounted), manufacturing | |
| 1410 | Ball clay mining | |
| 2913 | Ball joints (except motor vehicle and aircraft), manufacturing | |
| 3430 | Ball joints, motor vehicle, manufacturing | |
| 3699 | Ball point pens, manufacturing | |
| 2912 | Ball valves, industrial type, manufacturing | |