Ключевые слова: annuity, business, concept, conditions, continuance, control, date, day, deadline, duration, effective, efficiency, extent, fast, forecasting, future, glass, hour, hourglass, icon, illustration, limit, line, long, management, monthly, order, outline, part, period, plan, point, procrastination, productivity, project, quick, rapid, sand, schedule, sign, solution, strategy, symbol, term, time,