| Acronym/Abbreviation |
Meaning(s) Meanings Help ? |
| AP |
- Access Point (computers, Networking)
- Annual Passholder (collectibles, Disneyana)
- Associated Press (collectibles, Autographs/collectibles, Sports Autographs/sports, Sports Cards/sports, Cards Miscellaneous)

- Artist Proof (art, Prints/collectibles, Comics/dolls/sports, Sports Cards/sports, Cards Miscellaneous)

- All Pro (sports, Sports Cards/sports, Football Cards)

- Apocalypse (toys, Trading Card Games/toys, Magic: The Gathering)
- Advanced Placement (books, Textbooks and Education - educational textbooks)
- Arnold Palmer (sports, Golf Gear/sports, Golf Miscellaneous)
- African Pride (health and beauty, Hair Care)
|
| NASA |
- National Aeronautics and Space Administration (collectibles, Historical Memorabilia/collectibles, Space/collectibles, Autographs/collectibles, Other Autographs/collectibles, Militaria/collectibles, Militaria Miscellaneous/toys, Diecast Vehicles/toys, Planes/toys, Models and Kits/toys, Space/toys, Rocketry/movies, Miscellaneous/clothing, Miscellaneous/books, Miscellaneous/art, Prints/stamps, By Area or Country/stamps, United States)

- North American Sportscard Authenticators (sports, Sports Cards/sports, Grading Services)
|
| NYC |
- New York City (clothing, Styles - NYC style clothing/collectibles, Postcards/art, Prints/tickets/entertainment memorabilia, Music)

- New York Central (toys, Trains/toys, Railways and Cars/toys, Beginning with N/collectibles, Transportation/collectibles, Railway and Cars/collectibles, Beginning with N)
|