Ключевые слова: balance, blackboard, business, chalk, concept, copy space, cost, diagram, drawing, education, effective, expertise, finance, goal, hand, handwriting, horizontal, illustration, industries, industry, interaction, management, metaphor, method, model, money, organization, process, project, proportions, quality, recipe, relationship, result, results, risk, sketch, sketching, skill, speed, strategy, success, symbol, system, text, time, word,