| Abbreviation | Definition |
|---|---|
| AAGB | American Ambulance Great Britain |
| AAGB | Astrological Association of Great Britain |
| ABCD | American British Chinese Dutch |
| ABCDE | Association of British Columbia Drama Educators |
| ABCP | Association of British Chinese Professors |
| ABD | American British Dutch |
| ABDA | American British Dutch and Australia |
| ABEI | Association of British Engineers in Italy |
| ABFG | Association of British Fungus Groups |
| ABHI | Association of British HealthTech Industries |
| ABMA | Arlington British Medical Academy |
| ABP | Associated British Ports |
| ABPC | Associated British Picture Corporation |
| ABPI | Association of the British Pharmaceutical Industry |
| ABPS | Association of British Philatelic Societies |
| ABRS | Authority of British Riding Schools |
| ABRSM | Association of British Royal Schools of Music |
| ABSA | Affiliated British Sleddog Activities |
| ABSP | Association of British Scrabble Players |
| ABSW | Association of British Science Writers |