Ключевые слова: arrow, arrows, biorhythm, business, change, changes, changing, company, cube, cubes, cycle, cyclical, diagram, direction, duration, evolution, evolve, evolving, exist, existence, expectation, function, functional, length, life, life cycling, lifecycle, lifetime, longevity, manage, managing, measure, measurement, measuring, period, phase, phases, procedure, process, product, products, progress, progression, rhythm, sequence, sequential, situation, span, sphere, step, steps, symbol, symbolic, system, time,