| Acronym | Meaning |
| MDRD | Mission Data Requirements Document |
| CNTRL | Controller |
| PIV | Peak Inverse Voltage |
| SD | LSoftware Development Laboratory |
| LWR | Lower |
| MERL | Materials Equipment Requirement List |
| DAR | Deviation Approval Request |
| HS | Horizon Sensor |
| B/O | Breakout |
| FCOS | Flight Control Operational Software |