Ключевые слова: book, booklet, brochure, catalog, color, colorful, concept, contour, data, design, document, education, faq, fill, filled, flat, guidance, guide, guidebook, handbook, help, icon, illustration, info, information, instruction, isolated, learn, line, linear, manual, open, outline, page, paper, read, reference, service, shadow, sign, support, symbol, technology, training, tutorial, use, user,