The United States Postal Service Postage rates, zip codes, policies, stamp news and everything you need to know about the USPS. USPS Postal Bulletin The official source of information about new USPS stamp issues. Check the "Philately" section for stamp news and a listing of current pictorial postmarks. United Nations Postal Administration Find information about the latest UN stamps. Currently available stamps can be purchased directly from UNPA. The American First Day Cover Society The premier organization devoted to the advancement of First Day Cover collecting. American Philatelic Society Serving Stamp Collectors Since 1886 The American Topical Association Information for all topical enthusiasts Society of Israel Philatelists Vatican Philatelic Society American Air Mail Society Scandinavian Collectors Club United States Stamp Society