| Acronym | Meaning |
 | NNI-I | NASA Standard Initiator-Type I (was SMSI) |
| DBGMP | Data Bus Isolation Amplifier |
| PTIS | Program Test Input System |
| TF | Test Fixture |
| UPS | Uninterruptible Power System |
| MAUS | Messenschafteliche Autonome Experiment Unter |
| SRR | Software Requirements Review |
| SLPB | Spacelab Program Board |
| UL | User Interface |
| OSSRH | Orbiter Subsystem(s) Requirements Handbook |
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