This industry comprises establishments known either as magazine publishers 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. Illustrative Examples: Comic book publishers (except exclusive Internet publishing) Radio and television guide publishers (except exclusive Internet publishing) Magazine publishers (except exclusive Internet publishing) Scholarly journal publishers (except exclusive Internet publishing) Newsletter publishers (except exclusive Internet publishing) Trade journal publishers (except exclusive Internet publishing) Cross-References.