| Acronym | Meaning |
| PIO | Public Information Office |
| CWA | Controlled Work Area |
| NCC | Nominal Corrective Combination (Maneuver) |
| PCO | Postcheckout |
| SSC | Single-Stage Command |
| IBM | International Business Machines |
| TSSU | Test Signal Switching Unit |
| SM | SYstems Management |
| OT | Operational Trajectory |
| PML | Preliminary Materials List |