In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. July 3, 1884 the company's shares were included in the calculation base for the newly created stock index Dow Jones Transportation Average. By 1861 Western Union telegraph lines entangled the whole America. It's time to explore Europe. The Western Union Company is a financial services and communications company based in the United States. In the 1910-1920 years. Western Union is actively engaged in researching, innovating in the field of data transmission.