In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. In April 1851 companions registered in Albany New York and Mississippi Valley Printing Telegraph Company (NYMVPTC), which included founded two years before New York State Printing Telegraph Company. In 1914 Western Union engineers invented the first payment card - a prototype of the modern credit card. In 1856, in 7 years after the foundation of New York State Printing Telegraph Company, the company changed its name to Western Union Telegraph Company. Western Union made so that the time in all of American civil services was the same.