Ключевые слова: 20, 80, analysis, background, business, color, colorful, composition, concept, conceptual, design, different, economic, education, efficiency, effort, eighty, factor, few, flat, law, lay, management, many, memory, metaphor, notes, object, paper, pareto, percentage, percents, pink, presentation, principle, productivity, proportion, result, rule, space, sparsity, stickers, sticky, table, text, top, twenty, view, vital, white, yellow,