| Acronym | Meaning |
 | PVR | Precision Voltage Reference |
| SSO | Safety Signification Operation |
| T/C | Temperature Compensating |
| MECR | Maintenance Engineering Change Request |
| PTR | Program Trouble Report |
| OSTO | Office Of Space Transportation Operations |
| PAD | Propellant Acquisition Device |
| BDA | Backup Drive Amplifier |
| NOCC | Network Operations Control Center (GSFC) |
| D&P | Drain And Purge |
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