| Abbreviation | Definition |
|---|---|
| ABCL | American Birth Control League |
| ABCPF | Association of British Columbia Professional Foresters |
| ABCRS | American Board of Colon and Rectal Surgery |
| ABDF | American Batticaloa Development Fund |
| ABEC | Americans for Balanced Energy Choices |
| ABEF | Australian Bird Environment Foundation |
| ABEM | American Board of Emergency Medicine |
| ABES | Adult Basic Education Society |
| ABF | America the Beautiful Fund |
| ABFL | A Buddy For Life |
| ABFM | American Board of Family Medicine |
| ABFM) | American Board of Family Medicine |
| ABGA | American Blind Golf Association |
| ABH | Aryan Benevolent Home |
| ABIM | American Board of Internal Medicine |
| ABIMF | American Board of Internal Medicine Foundation |
| ABIP | Association of Batterers Intervention Programs |
| ABLE | Achieving Beyond Limited Expectations |
| ABLE | Association for Better Living and Education |
| ABMA | Animal Behavior Management Alliance |