| Acronym | Meaning |
| JO | Job Order |
| RD/SB | Rudder Speed Brake |
| ARS | Archive And Retrieval Subsystem (PPCU) |
| RLG | Ring Laser Gyro |
| MDC | Mission Director Center |
| MAAB | Materials Application Advisory Board |
| CATEG | Category |
| ESVS | Escape System Ventilation System |
| PCO | Program Controlled Output |
| MMAS | Material Management Accounting (Accountability) System |