| Acronym | Meaning |
| ESS | Essential |
| SLM | Sound Level Meter |
| IOA | Input/Output Or Assembly |
| GSDL | Ground Software Development Laboratory |
| TR2 | Payload Furnished Mars Tape Recorder (2 Of 2) |
| OASPL | Overall Sound Pressure Level |
| I | DAS Integrated Data Acquisition System |
| OML | Outside Mold Line |
| RC | Recurring Cost |
| IAD | Interface Analysis Document |