| Acronym/Abbreviation |
Meaning(s) Meanings Help ? |
| AGS |
- Advanced Grading Specialists (sports, Sports Cards/sports, Grading Services - see www.advancedgrading.com)
- American Gem Society (jewelry, Certification)
- Automatic Generating System (watches - by Seiko)

- Aircraft Generation Squadron (collectibles, Militaria/collectibles, Air Force)
|
| ATM |
- Asynchronous Transfer Mode (computers, Networking)
- Automatic Teller Machine (business and industrial, Food Service and Retail/stamps, Miscellaneous - stamps from an ATM machine)
- Atmospheres (watches - a unit of pressure used in watches to indicate water-resistance. Approximately 10 meters per ATM - a 20 ATM watch would be water resistant to 200 meters.)

- At The Moment (other, Forum Discussion)
|
| BMW |
- Bayerische Motoren Werke (motor vehicles, Manufacturers/toys, Diecast Vehicles/toys, Manufacturers and Brands/toys, Models and Kits/toys, Automotive/toys, Military and Armor/toys, Slot Cars/collectibles, Transportation/collectibles, Automobilia/collectibles, Advertising/consumer electronics, Car Electronics/consumer electronics, Installation Products/sports, Fan Apparel and Souvenirs/sports, Racing/clothing, Miscellaneous/computers, Miscellaneous/watches - German for 'Bavarian Motor Works')
|
| BWC |
- Black Window Car (toys, Diecast Vehicles/toys, NASCAR - a diecast car with black windows so that you cannot see into the drivers area, no slot for coins.)
- Buttes Watch Company (watches)

|
| C |
- Circa (other, Time Periods - see also CA)
- Century (other, Time Periods)
- Carat (jewelry, Weights and Measuring/watches/other, Units of Measure - see also CT)

|
| Cal |
- California (home and garden, Bedding/home and garden, Furniture - as in California King/other, States)
- Caliber (sports, Hunting/sports, Hunting Miscellaneous/sports, Paintball Gear/collectibles, Militaria/collectibles, Guns and Ammunition/other, Units of Measure)
- Calibre (watches - referring to watch calibre numbers)

- Calories (other, Units of Measure)
|
| COSC |
- Controle Officiel Suisse des Chronometres (watches - the official Swiss chronometer testing institute)
|
| CT |
- Carat (jewelry, Weights and Measuring/watches/other, Units of Measure - see also K)

- Connecticut (other, States/antiques, Maps)
- Count (other, Miscellaneous - used to indicate the number included)
- Closed Toe (dolls - shoes)
- Chuck Taylor (clothing, Shoes - Converse)
- [Classic/Corellian] Trilogy (toys, Star Wars/toys, Action Figures)

- Clone Trooper (toys, Star Wars/toys, Action Figures)

- Construction Tires (toys, Diecast Vehicles/toys, Hot Wheels - Hot Wheels, 1980-present)
|
| DKNY |
- Donna Karen New York (clothing, Brands/watches/health and beauty, Fragrances/home and garden, Bedding - see www.dkny.com)
|
| DS |
- Dual Screen (video games, Systems - Nintendo, see also NDS)
- Double-Sided (computers, Drives - disks)
- Disney Store (collectibles, Disneyana)

- Disney's Storybook (collectibles, Disneyana)

- Dark Side (toys, Trading Card Games/toys, Star Wars)
- Dark Sovereigns (toys, Trading Card Games/toys, Vampire: The Eternal Struggle)
- Dark Steel (toys, Trading Card Games/toys, Magic: The Gathering)
- Double Security (watches - Certina)

- Designer Skin (health and beauty, Skin Care)
- Double Sided (entertainment memorabilia, Lobby Cards and Posters - a 1SH sized poster having printing on both the front and the back of the paper)
- Dead Stock (other, General Item Condition - unsold older stock, usually used with shoes. See also VNDS and NDS.)
|
| EMT |
- Emergency Medical Technician (collectibles, Historical Memorabilia/collectibles, Firefighting/collectibles, Knives/collectibles, Militaria/collectibles, Militaria Miscellaneous/business and industrial, Healthcare/business and industrial, Medical Speciality/business and industrial, Emergency and EMT/business and industrial, Industrial Supply/business and industrial, Government and Public Safety/clothing, Miscellaneous/jewelry, Miscellaneous/watches/motor vehicles, Miscellaneous/health and beauty, Medical and Special Needs/health and beauty, Monitoring and Testing/books, Medical/toys, Diecast Vehicles/toys, Fire and Emergency/health and beauty, Healthcare/health and beauty, First Aid)

- Extended Mobility Technology (motor vehicles, Tires and Wheels - Goodyear)

- Electrical Metallic Tubing (business and industrial, Industrial Electrical/business and industrial, Connectors Switches and Wires - conduit)
|
| ESQ |
- Esquire (watches)
|
| ETA |
- Elegance, Technology and Accuracy (watches - a Swiss producer of mechanical and quartz watch movements which include ETA 2824 and ETA 2892. See www.eta.ch)

- Extension Travel Adjustment (sports, Cycling - Marzocchi bicycle forks, see www.marzocchi.com)
- Estimated Time of Arrival (other, Payment and Shipping)
|
| GCW |
- Gold Center Wheel (watches)
|
| GF |
- Gold Filled (jewelry, Metals and Alloys/watches/collectibles, Pens and Pencils)

- Gatefold (music, Records/music, Records Miscellaneous - see also Gfold)
- Good Fine (other, General Grades)
|