In the early forties of the 20th century, Western Union has used the first time a commercial intercity microwave transmission system. 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 2007 the company made 167.7 million transactions on money transfers between individuals and 404.6 million transactions between physical and legal persons. In 1849, Selden and Sibley, the founders of the future Western Union, created the New York State Printing Telegraph Company. Western Union made so that the time in all of American civil services was the same.