Founded in 1886, the American Philatelic Society is the world's largest non-profit organization dedicated to the hobby of stamp collecting. The APS and its affiliated groups oversee more than eighty stamp exhibitions across North America each year, including the Great American Stamp Show. The APS issued several joint forerunner cards in the early 1970s (these are designated with an F prefix), but didn't begin their official souvenir card program until 1977 at StampShow '77. Up until the mid-1990s, many of these cards featured enlarged stamp designs printed in intaglio using what appears to be a photo-etching process. The last APS card was issued at StampShow 2017 in Richmond, VA.