| Acronym | Meaning |
| DIN | Deutsches Insitut Fuer Normung |
| BWRAF | Buoyancy |
| PPB | Peak Performance Bouyancy |
| TP | Test Pressure |
| ADT | Actual Dive Time |
| HPNS | High Pressure Nervous Syndrome |
| RSTC | Recreational Scuba Training Council. Organization That Sets Basic Guidelines For Scuba Diving Agencies. |
| MCS | Marine Conservation Society |
| DEMA | Diving Equipment Manufacturers Association |
| IOC | Instructor Orientation Course (PADI) |