Ключевые слова: add, add up, adding, balance, black, business, button, calculating, calculus, click more, clicks, code, control, count, counting, digits, equipment, finance, gray, hand count, hand tally, headcount, industry, instrument, instrument of measurement, isolated, machine, mathematical, mathematics, measurement, metal, metalic, nobody, number, object, push, silver, single, single object, sport, store, subtraction, sum up, tally, tally chart, tally counter, technology, thousand, voting, white,