| Naics index | Naics index description |
|---|---|
| 611512 | Schools, aviation |
| 611513 | Apprenticeship training programs |
| 611513 | Carpenters' apprenticeship training |
| 611513 | Craft union apprenticeship training programs |
| 611513 | Electricians' apprenticeship training |
| 611513 | Mechanic's apprenticeship training |
| 611513 | Plumbers' apprenticeship training |
| 611513 | Sheet metal workers' apprenticeship training |
| 611513 | Steam fitters' apprenticeship training |
| 611513 | Trade union apprenticeship training programs |