Ключевые слова: advice, answer, background, book, booklet, brochure, business, catalog, concept, construction, content, cover, data, design, document, education, expertise, flat, graphic, guidance, guide, guidebook, handbook, help, icon, illustration, info, information, instruction, learn, manager, manual, open, page, paper, paperwork, project, reference, service, software, support, symbol, textbook, training, tutorial, use, user, white, work,