Ключевые слова: abstract, account, accounting, add, algebra, background, balance, business, button, calculate, calculation, calculator, communication, computer, count, cyber, datum, device, digit, digital, display, education, electronic, enter, equipment, finance, financial, information, input, key, keyboard, keypad, mathematic, mathematical, money, network, number, office, office supply, pc, plastic, plu, screen, set, sign, symbol, tax, tool, type, work,