| 3909 | Braid, mohair, wig, manufacturing | |
| 3824 | Braiding machine, textile, manufacturing | |
| 3420 | Braille copying | |
| 3420 | Braille printing | |
| 3829 | Brake and brake part manufacturing | |
| 3829 | Brake burnishing machine manufacturing | |
| 3559 | Brake lining, rubber, manufacturing | |
| 9513 | Brake repairing, motor vehicle | |
| 3845 | Brake, aircraft, manufacturing | |
| 3829 | Brake, except electro-magnetic and for motor vehicle and aircraft, manufacturing | |
| 3843 | Brake, motor vehicle, manufacturing | |
| 3116 | Bran manufacturing | |
| 3909 | Branding iron manufacturing | |
| 3131 | Brandy manufacturing | |
| 3720 | Brass casting and forging | |
| 3720 | Brass ingot manufacturing | |
| 3720 | Brass pipe manufacturing | |
| 3420 | Brass plate engraving | |
| 3720 | Brass plate manufacturing | |
| 3529 | Brass polish manufacturing | |
| 3720 | Brass rail manufacturing | |
| 3720 | Brass rolling and drawing | |
| 3720 | Brass sheet manufacturing | |
| 3720 | Brass smelting and refining | |
| 3720 | Brass tube manufacturing | |
| 3819 | Brass type manufacturing | |
| 3220 | Brassiere cutting and sewing | |
| 3111 | Brawn manufacturing | |
| 3117 | Bread baking | |
| 3121 | Bread improver manufacturing | |
| 3824 | Bread slicing machine, industrial or commercial, manufacturing | |
| 6100 | Breakfast food, cereal, wholesaling | |
| 5000 | Breakwater construction | |
| 3220 | Breeches cutting and sewing | |
| 3829 | Bren gun manufacturing | |
| 3824 | Brewers' and maltsters' machinery manufacturing | |
| 3121 | Brewers' sugar manufacturing | |
| 3133 | Brewery | |
| 2901 | Brick earth quarrying | |
| 3691 | Brick flooring manufacturing | |