41 Publication of educational materials in the nature of books, textbooks, reference books, journals, and periodicals in the fields of artificial intelligence and machine learning; publication of on-line educational materials in the nature of electronic books, electronic journals and other periodicals, digital videos, and digital audio in the fields of artificial intelligence and machine learning; providing online non downloadable electronic publications, namely, articles, tutorials in the nature of articles, guide-books and e-books, and technical presentations in the nature of e-books, presentation slides, and digital video recordings in the fields of artificial intelligence and machine learning.