561720  Janitorial Services 

This industry comprises establishments primarily engaged in cleaning
building interiors, interiors of transportation equipment (e.g.,
aircraft, rail cars, ships), and/or windows.

The data published with NAICS code 561720 are comprised of these parts
of the following SIC industries:

     4581 (pt)  Airport Cleaning and Janitorial Services
     7342 (pt)  Disinfecting and Deodorizing Services
     7349       All Other Building Cleaning and Maintenance Services