| Abbreviation | Definition |
|---|---|
| GADL | Greater Atlanta Diving League |
| GODS | Golden Oldies Diving Society |
| HDS | Historical Diving Society |
| HLSD | Harbour Lights Scuba Diving |
| HSDA | Handicapped Scuba Diving Alliance |
| ICBA | International Compressed Air Breathing Apparatus |
| IDF | International Diving Federation |
| IDI | International Diving Institute |
| IDSA | International Diving Schools Association |
| IISD | Indiana International School of Diving |
| ITDA | International Technical Diving Agency |
| JEEP | Junior Engine Extra Power |
| JEEP | Junk Engineering End Product |
| MEDS | Marine Engineering Diving Services |
| MOPAR | Most Outstanding Performance and Reliability |
| MSDA | Malaysia Scuba Diving Association |
| MSDA | Mauritian Scuba Diving Association |
| NDA | Niagara Divers Association |
| NDC | National Diving Council |
| NDL | No Decompression Limit |