This industry comprises establishments known as publishers (except newspaper, magazine, book, directory, mailing list, and music publishers). These establishments may publish works in print or electronic form. Illustrative Examples: Art print publishers (except exclusive Internet publishing) Greeting card publishers (except exclusive Internet publishing) Calendar publishers (except exclusive Internet publishing) Cross-References. ? Establishments publishing exclusively on the Internet are classified in Industry 51913, Internet Publishing and Broadcasting and Web Search Portals; ? Establishments known as newspaper publishers are classified in Industry 51111, Newspaper Publishers; ? Establishments known as magazine and other periodical publishers are classified in Industry 51112, Periodical Publishers; ? Establishments known as book publishers are classified in Industry 51113, Book Publishers; ? Establishments primarily engaged in publishing directories and mailing lists are classified in Industry 51114, Directory and Mailing List Publishers; ? Establishments known as music publishers are classified in Industry 51223, Music Publishers; and ? Establishments primarily engaged in manufacturing manifold business forms are classified in Industry 32311, Printing.