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. Before transition to remittances Western Union company rendered services on sphere of cable communication. In the 1910-1920 years. Western Union is actively engaged in researching, innovating in the field of data transmission.