Ключевые слова: achievement, advice, black, board, business, businessman, career, chart, concept, conceptual, creative, demonstration, draw, education, flow, glass, goal, hand, idea, improvement, ingredient, inspire, lecture, male, management, manager, marker, marketing, modern, pen, pencil, plan, presentation, quality, screen, seminar, strategy, success, symbol, teacher, text, virtual, vision, wall, white, whiteboard, write,