Ключевые слова: advert, advertisement, advertising, art, authority, backdrop, background, billboard, blackboard, board, business, chalk, chalkboard, classroom, color, company, compliance, concept, control, copy, corporate, design, desk, direction, dirty, discipline, draw, dust, education, empty, follow, green, grunge, guidance, guide, guidelines, handwriting, information, instruction, knowledge, law, learn, learning, legal, lesson, management, manual, marble, message, messy, mockup, note, object, office, organization, paper, pattern, phrase, policy, principle, procedure, process, regulation, regulations, rubbed, rule, rules, school, scratch, sign, space, stationery, strategy, strokes, study, success, surface, teach, template, text, texture, used, wallpaper, white, wiped, work, written,