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 educational competitions in the fields of mechanics, aeronautics, engineering, construction, maintenance, repair and maintenance of business jets, for non-business and non-commercial purposes; organization of exhibitions, training workshops, colloquiums, conferences, congresses, seminars, and symposiums, all organized 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