In 1920, Western Union has implemented the world's first transmission of images over the ocean. In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. Western Union offers one of the easiest ways for families and friends to send money and stay connected almost anywhere in the world. One of the common kinds of money transfer is a transfer via the international system of Western Union. In October 1871 the company has implemented the world's first telegraph money order. After a century money transfers have become a major source of income for Western Union. In 1933, by the Western Union Company were invented "singing telegrams".