| 5139 | Waxed paper, wholesale | |
| 2320 | Waxes, petroleum, made from refined petroleum | |
| 2320 | Waxes, petroleum, made in petroleum refineries | |
| 2424 | Waxes, polishing (e.g., floor, furniture), manufacturing | |
| 5139 | Waxes, wholesale | |
| 5020 | Waxing and polishing, automotive | |
| 0122 | Weanling (feeder) pigs, raising | |
| 2927 | Weapons, self-propelled, manufacturing | |
| 7421 | Weather forecasting services | |
| 2811 | Weather strip, metal, manufacturing | |
| 2022 | Weather strip, wood, manufacturing | |
| 5143 | Weather stripping materials, wholesale | |
| 3312 | Weather tracking equipment, manufacturing | |
| 3130 | Weatherproof wire and cable, nonferrous | |
| 4530 | Weatherproofing (i.e., insulation), contractor | |
| 4530 | Weatherproofing concrete | |
| 4530 | Weatherstripping contractor | |
| 4530 | Weatherstripping installation | |
| 1729 | Weatherstripping made from purchased textiles | |
| 2519 | Weatherstripping, rubber, manufacturing | |
| 1729 | Weaving and finishing narrow fabrics | |
| 1711 | Weaving and finishing of broad-woven fabrics (except rugs, tire fabric) | |
| 1711 | Weaving broad-woven fabrics (except rugs, tire fabric) | |
| 1711 | Weaving broad-woven felts | |
| 1722 | Weaving carpets, rugs and mats | |
| 1729 | Weaving fabric (i.e., 30 cm/12 in. or less in width) | |
| 1711 | Weaving fabrics (except wool and similar animal fibre), more than 30 cm (12 inches) in width | |
| 1711 | Weaving fabrics, wool and similar animal fibre, more than 30 cm (12 inches) in width | |
| 2926 | Weaving machinery, manufacturing | |
| 1729 | Weaving narrow fabrics | |
| 7220 | Web page developing | |
| 1729 | Webbing (except jute), weaving | |
| 2029 | Webbing, cane, reed and rattan, manufacturing | |
| 1729 | Webbing, jute, weaving | |
| 1729 | Webbing, narrow woven, weaving | |
| 7494 | Wedding and portrait photography services | |
| 9309 | Wedding chapels (except churches) | |
| 1810 | Wedding dresses, women's and misses', cut and sewn from purchased fabric | |
| 7494 | Wedding photography services | |
| 9309 | Wedding planning services | |