Ключевые слова: 20, 80, 8020, abstract, analysis, analyze, background, business, chart, compare, concept, conceptual, design, drawing, economy, efficiency, effort, eighty, eightytwenty, evaluate, evaluation, factor, finance, financial, graph, hand, handwriting, idea, law, management, message, pareto, pareto principle, percent, percentage, principle, productivity, profit, result, rule, sparsity, success, symbol, text, texture, theory, twenty, vital, word, write,