Ключевые слова: 2017, accessibility, addition, background, button, calculating, capacity, click, concepts, control, count, countdown, counter, crowd, crowded, entrance, equipment, hand, headcount, holding, horizontal, ideas, instrument, machine, measurement, metal, new year, new year 2017, number, numbers, order, patience, people, poll, push, report, safety, standing, time, tourist, voting, white,