In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. Another invention of Western Union - time synchronization. The Western Union Company is a financial services and communications company based in the United States. In 1849, Selden and Sibley, the founders of the future Western Union, created the New York State Printing Telegraph Company. 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.