Ключевые слова: achievement, analysis, analyze, blackboard, business, chalkboard, change, chart, circle, company, concept, curve, cycle, decline, diagram, education, graph, graphic, growth, illustration, image, introduction, leaf, life, line, management, market, marketing, mature, maturity, period, phase, plc, presentation, product, product life cycle, progress, sale, solution, stage, step, strategy, success, system, tree, vector,