In the early forties of the 20th century, Western Union has used the first time a commercial intercity microwave transmission system. In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. In 1914 Western Union engineers invented the first payment card - a prototype of the modern credit card. Western Union provides consumers and businesses with fast, reliable and convenient ways to send and receive money around the world, to send payments and to purchase money orders. Number of active holders of "Golden Card" of Western Union amounted to 9.5 million people worldwide.