| Acronym | Meaning |
 | GETIL | Ground Elapsed Time Of Landing (for TIG Of |
 | PI | Principal Investigator |
 | PCS | Pressure Control System |
 | DEU | Display Electronic(s) Unit |
 | TVCS | Thrust Vector Control System |
 | PDU | Pulse Detection Unit |
 | HC | Hybrid Computer |
 | OT&E | Operational Test And Evaluation |
 | TFS | Telemetry Format Selection |
 | PSSU | Patch Survey And Switching Unit |