| Acronym/Abbreviation |
Meaning(s) Meanings Help ? |
| APS |
- Advanced Photo System (cameras, Film Based Cameras/cameras, Film)

- Advanced Power System (home and garden, Vacuum Cleaners - power supply for iRobot)
- American Philatelic Society (stamps, Certification Services - see www.stamps.org)
|
| ASA |
- Amateur Softball Association (sports, Baseball and Softball Gear)
- Air Source Adapter (sports, Paintball Gear)
- Army Security Agency (collectibles, Militaria/collectibles, Army)
- American Standards Association (cameras, Film)

- Adaptive Security Appliance (computers, Networking - Cisco)
- Accugrade Sportscard Authentication (sports, Sports Cards/sports, Grading Services - see www.asa-accugrade.com)
|
| HD |
- Hard Drive (computers, Drives/computers, Desktops and Laptops)
- High Definition (consumer electronics, Televisions/consumer electronics, Home Theater/consumer electronics, Satellite and Cable TV/consumer electronics, A/V Accessories and Cables/movies, Formats/cameras, Lenses/cameras, Non Specific/cameras, Film/cameras, Camcorders/video games, Miscellaneous/sports, Sports Cards/sports, General Card Types)

- Harley Davidson (motor vehicles, Manufacturers/clothing, Miscellaneous/collectibles, Transportation/collectibles, Automobilia)

- Heavy Duty (motor vehicles, Miscellaneous/toys, Radio Controlled/toys, Parts and Accessories/home and garden, Tools/business and industrial, Construction)

- High Density (other, Miscellaneous)
|
| ISO |
- Innovative Styling Options (health and beauty, Hair Care)
- International Standards Organization (cameras, Film)

|
| MM |
- Millimeter(s) (jewelry, Weights and Measuring/cameras, Film/cameras, Lenses/cameras, Non Specific/cameras, Binoculars/cameras, Telescopes/collectibles, Rocks and Fossils/collectibles, Militaria/collectibles, Guns and Ammunition/collectibles, Pens and Pencils/sports, Cycling/sports, Hunting/sports, Hunting Miscellaneous/consumer electronics, Media Players/consumer electronics, A/V Accessories and Cables/movies, Formats/other, Units of Measure)

- Mickey Mouse (collectibles, Disneyana)

- [Magical/Memorable] Moments (collectibles, Disneyana)

- Mounted Memories (collectibles, Autographs/collectibles, Sports Autographs/collectibles, Entertainment Autographs/collectibles, Other Autographs/collectibles, Authenticating)
- Mercadian Masques (toys, Trading Card Games/toys, Magic: The Gathering)
- Mighty Morphin (toys, Action Figures/toys, Power Rangers)
- Minneapolis-Moline (business and industrial, Tractors - a manufacturer)
- Mounted Mint (stamps, Gum Conditions)

- Modified Margin (stamps, Miscellaneous)

|
| SPD |
- Shimano Pedaling Dynamics (clothing, Shoes/sports, Cycling)

- Speed (cameras, Film/motor vehicles, Miscellaneous/sports, Cycling/toys, Radio Controlled/toys, RC Miscellaneous)

- Space Patrol Delta (toys, Action Figures/toys, Power Rangers/clothing, Miscellaneous/video games, Titles)
|