Ключевые слова: analysis, analytics, billboard, black, blackboard, board, business, chalk, chalkboard, chart, class, classroom, college, corporate, data, design, diagram, education, financial, flat, frame, graph, graphic, growth, icon, illustration, increase, infographic, information, investment, knowledge, learning, lesson, marketing, presentation, profit, progress, sales, school, sign, study, symbol, university, white,