*   approximately 90 dealers from throughout the United States and abroad, as well as a professional public auction hosted by Harmer-Schau Auction Galleries Inc. of California.
* postal administrations, including the U.S. Postal Service
* participation of important national collectors’ societies, including annual meetings of the Mexico-Elmhurst Philatelic Society International (MEPSI), the Texas Philatelic Association, and the Texas Postal History Society.
* scores of meetings and seminars catering to stamp hobby interests of every kind
* more than 6,000 pages of exhibits, including the annual single-frame Champion of Champions competition and Most Popular Exhibit competition. If you would like to take part more information is available.
* the world’s best-known stamp error ― the famous 1918 Inverted Jenny, with a book value of $400,000 ― plus the discovery pane of the Dag Hammarskjold invert and other great rarities 
* “Stamps in Your Attic” -- informal evaluations of collections offered throughout the show, sponsored by the dealer-experts of the National Stamp Dealers Association
* special dime and dollar booths, plus educational opportunities for collectors of all ages and levels of experience