In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. Each money transfer is protected with control number, that allows you to track and to ensure prompt payment of money specified by you person. In 1866, Sibley ordered the engineers to develop a Western Union telegraph system of stock quotes in real time. 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 the early 60s Western Union has put into operation transcontinental microwave system of data transmission via radio waves, completely replacing the web of telegraph poles and wires. Payment systems are one of basic elements of infrastructure of e-commerce. 1970 - a new service called In 1879 Western Union left the telephone business after losing a lawsuit against Alexander Graham Bell - the patent holder on the phone. 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 -