In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. In 1935, Western Union has put into operation first intercity fax communication. 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. The first offices of company were located in the Reynolds Arcade building in Rochester, New York. The sign above the main entrance to the building -