The USPS and the World of Stamp Collecting
Even before many philatelists thought up the hobby of stamp collecting, it is rather obvious that the act of exchanging letters through a centralized system that would recognize stamps as payment to cover carriage costs would have to be put in place. The American Philatelic Society (APS), which is the biggest convention of philatelists and collectors in the entire world, is predated by the United States Postal Service.




