In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. In 1877, starting from September, New York City residents began to have the opportunity to check the time on clock with the "time ball", located on the roof of constructed in the same year a new corporate headquarters - Western Union Building. In October 2006 the company made an initial public offering of shares on the New York Stock Exchange, becoming independent from First Data company. Payment systems are one of basic elements of infrastructure of e-commerce. In 2007 the company made 167.7 million transactions on money transfers between individuals and 404.6 million transactions between physical and legal persons. The Western Union Company is a financial services and communications company based in the United States. 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 - Western Union made so that the time in all of American civil services was the same.