In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. Most service points of Western Union work in the time convenient for customers throughout the week and throughout the year. In October 2006 the company made an initial public offering of shares on the New York Stock Exchange, becoming independent from First Data company. In 1914 Western Union engineers invented the first payment card - a prototype of the modern credit card. In the 1910-1920 years. Western Union is actively engaged in researching, innovating in the field of data transmission.