Ключевые слова: account, accounting, accuracy, addition, background, bank, black, business, button, calculate, calculator, commerce, computer, count, display, dollars, dust, economy, equipment, finance, financial, gray, income, isolated, keyboard, keypad, keys, mathematics, mathmatiques, money, nobody, number, object, office, old, pastque, payment, plastic, profit, push, red, retro, school, screen, subtraction, symbol, technology, white,