| Acronym | Meaning |
 | SIT | Software Integrated Test |
| ONBD | Onboard |
| SLSA | Shuttle Logistics Support Aircraft |
| SOS | Source Of Supply |
| ERA | Electrical Replaceable Assembly |
| SST | Subsystem Terminal On Spacelab |
| PPP | Peak Pulse Power |
| SM/PM | System Management/Performance Monitor |
| ESS | Equipment Support Section |
| PK | Peak (Valve) |
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