| 2926 | Net and lace making machinery, manufacturing | |
| 5131 | Net goods, wholesale | |
| 3693 | Nets (e.g., badminton, basketball, tennis), not made in weaving mills | |
| 1711 | Nets and nettings, broad-woven, weaving | |
| 3693 | Nets for sports and games, manufacturing | |
| 1723 | Nets, made in cordage or twine mills | |
| 1729 | Netted fabrics, 30 cm/12 in. or less in width, made in lace mills | |
| 1730 | Netting, made in knitting mills | |
| 1729 | Netting, made on a lace or net machine | |
| 2520 | Netting, plastics, manufacturing | |
| 2899 | Netting, woven wire, made from purchased wire | |
| 9213 | Network broadcasting services, radio | |
| 9213 | Network radio broadcasting | |
| 7210 | Network systems design, computer | |
| 7210 | Network systems integration, computer | |
| 9213 | Network, cable television | |
| 8511 | Neurological hospitals | |
| 8512 | Neurologists' offices | |
| 1551 | Neutral spirits, beverage (except fruit), manufacturing | |
| 1551 | Neutral spirits, beverage, fruit, manufacturing | |
| 5122 | Neutral spirits, wholesale | |
| 3312 | Neutron activation analysis instruments, manufacturing | |
| 5030 | New and rebuilt auto parts, wholesale agents and brokers | |
| 5010 | New and used motor vehicle, wholesale agents and brokers | |
| 4520 | New home construction | |
| 7414 | New product development consulting services | |
| 2022 | Newel posts, wood, manufacturing | |
| 2212 | Newpaper publishing and commercial printing combined | |
| 9220 | News agencies | |
| 5239 | News agents, retail | |
| 5139 | News agents, wholesale | |
| 7499 | News clipping service | |
| 9220 | News correspondents, independent | |
| 5239 | News dealers, retail | |
| 9220 | News feature syndicates | |
| 9220 | News picture gathering and distributing service | |
| 9220 | News reporting service | |
| 9220 | News reporting services for newspapers and periodicals | |
| 9220 | News syndicates | |
| 9220 | News ticker service | |