| Abbreviation | Definition |
|---|---|
| DIVG | Diving |
| DIWA | Diving Instructor World Association |
| DMAC | Diving Medical Advisory Council |
| DMT | Diving Medical Technologist |
| DOL | Diving Off Ledges |
| DOWC | Diving and Offshore Works Consultancy |
| DROP | Diving Reflex Osmotic Performance |
| DSAT | Diving Science And Technology |
| DSD | Discover Scuba Diving |
| DSV | Diving Support Vessel |
| DUI | Diving Unlimited International |
| DUW | Diving Under Water |
| DWP | Diving With a Purpose |
| EDLF | Egyptian Diving and Lifesaving Federation |
| EDTC | European Diving Technology Committee |
| FAD | Fantastically Awesome Diving |
| FCDA | Fairfield County Diving Association |
| FCDA | Finnish Cave Diving Association |
| FII | Freediving Instructors International |
| FKD | Frog Kick Diving |