41 Educational services, namely, instruction by means of classes, courses, and training in the fields of mechanics, aeronautics, engineering, construction, maintenance, repair and maintenance of business jets; non-downloadable electronic publications, in the nature of manuals, textbooks, service bulletins, advisories, brochures, guides, handbooks, pamphlets, white papers, and conference papers in the fields of mechanics, aeronautics, engineering, construction, maintenance, repair and maintenance of business jets; entertainment in the nature of organization of competitions in the fields of mechanics, aeronautics, engineering, construction, maintenance, repair and maintenance of business jets; organization of exhibitions, training workshops, colloquiums, conferences, congresses, seminars, and symposiums for educational purposes in the fields of mechanics, aeronautics, engineering, construction, maintenance, repair and maintenance of business jets; vocational guidance; day camps; publication of books and texts; publication of electronic books and journals online