Ключевые слова: accessibility, building, busy, capacity, census, click, colour, concepts, concert, control, counter, counting, crowd, crowded, demography, doorman, entrance, group of people, hand, headcount, holding, horizontal, ideas, in a row, instrument of measurement, large group of people, leading, long, machine, maximum, metal, number, order, patience, people, people in a row, people in the background, poll, push button, queue, queuing, recreational pursuit, report, safety, stadium, standing, tally, tally counter, time, tourist, voting, waiting, waiting in line,