| Naics index | Naics index description |
|---|---|
| 561499 | Mail presorting services |
| 561499 | Medical coding services, not combined with accounting services |
| 561499 | Teleconferencing services |
| 561499 | Videoconferencing services |
| 561510 | Online travel agencies |
| 561510 | Travel agencies |
| 561510 | Travel management services |
| 561520 | Tour operators (i.e., arranging and assembling tours) |
| 561520 | Travel tour operators |
| 561520 | Wholesale tour operators |