| Naics index | Naics index description |
|---|---|
| 813930 | Collective bargaining units |
| 813930 | Employees' associations for improvement of wages and working conditions |
| 813930 | Federation of workers, labor organizations |
| 813930 | Federations of labor |
| 813930 | Industrial labor unions |
| 813930 | Labor federations |
| 813930 | Labor unions (except apprenticeship programs) |
| 813930 | Trade unions (except apprenticeship programs) |
| 813930 | Trade unions, local |
| 813930 | Unions (except apprenticeship programs), labor |