ABCDEF
| Acronym | Definition |
|---|---|
| ABCDEF | Advanced Bonewits' Cult Danger Evaluation Frame (est. 1979) |
| ABCDEF | American Boys Club for the Defense of Errol Flynn |
| ABCDEF | A Better Complete Development Engineering Firm (San Carlos, CA) |
| ABCDEF | Abstinence, Be Faithful, Correct and Consistent Condom Use and Circumcision, Diaphragm for HIV Prevention, Exposure Prophylaxis, Female-Controlled Microbicides (approach to prevention of AIDS virus) |