41 Arranging and conducting educational conferences, conventions and exhibitions; conducting educational and training classes in the use of computerized information retrieval services; publication services, namely, publication of journals, books, brochures, leaflets, manuals, text books, reference materials, newsletters, altases and magazines in hard copy, electronic form and on various types of media; electronic publishing services, namely, publication of text and graphic works of others on CD-ROMs featuring information in the fields of business, industry, [ education, academics, government, law, tax, agricultural and biological sciences, arts and humanities, health, chemistry and chemical engineering, computer science, earth and planetary sciences, economics, business and management, engineering, energy and technology, environmental sciences, life sciences, materials sciences, mathematics, medicine, neuroscience, pharmacology, pharmaceutical science and toxicology, physics and astronomy, social and behavioral sciences, automotive and trucking, book publishing, building and construction, design, design engineering, electronics design and communications, electronics manufacturing, in-stat research, entertainment communications and media, food and packaging, foodservice and lodging, gifts, jewelry and home textiles, manufacturing processes, manufacturing products, printing and converting, processing, retail home furnishings, scientific and medical, supply chain, television and telecom, variety, accountancy and business, administration, agriculture, building and construction, healthcare, horticulture, hotel and catering, logistics, retail, technics, tourism, air transport, banking, catering, chemicals, computing, construction, electrical, electronics, industrial and commercial, motor trade, office equipment, optical, personal care, personnel and occupational health, professional, property, railways, recruitment, road haulage, science, shipping, social services, television, utilities, ] aerospace and defense, [ agricultural, forestry and natural resources, arts and entertainment, books and publishing, buildings, property and interior design, electronics and electrical engineering, engineering, manufacturing and processing, foodservice and hospitality, information technology and communications, marketing, business and training, safety and security, sports, leisure and health, trade shows, conferences, computerized information storage and retrieval services, advertising, news, research, employment, recruiting and a wide variety of topics of general interest ]