Ключевые слова: advice, background, black, blackboard, board, business, chalk, chalkboard, communication, compliance, concept, conditions, consulting, education, guidance, hand, handwriting, holding, information, instruction, isolated, know, knowledge, law, learn, legal, man, management, message, moral, note, person, phrase, policy, principle, protocol, regulation, reminder, rule, rules, school, sign, support, term, terms, text, warning, white, wisdom, word,