511120  Periodical Publishers 

This U.S. industry comprises establishments known as magazine or periodical
publishers. These establishments carry out the operations necessary for
producing and distributing magazines and other periodicals, such as gathering,
writing, and editing articles, and selling and preparing advertisements. These
establishments may publish magazines and other periodicals in print or
electronic form.

The data published with NAICS code 511120 include the following SIC industry:

2721 Periodicals                                                               

This definition comes from the 1997 NAICS manual. However, for this industry,
the 1997 Economic Census Manufacturing did not fully implement the conversion
to NAICS. Data for NAICS industry 511120 do not include paperboard mills
primarily engaged in converting paperboard into paperboard products. The NAICS
definitions will be fully implemented with the 2002 Economic Census.