| Acronym | Meaning |
| DCS | Design Criteria Specification |
| CD | Center Director (KSC Directorate) |
| FAA | Federal Aviation Administration |
| RS | Redundant Set (computers) |
| RPS | Record And Playback System (Subsystem) |
| OHF | Occupational Health Facility |
| PLD | Program Listing Document |
| MHSC | Manipulator Handset Controller |
| SPC | Synoptic Properties Code |
| IPS | Ips International Pipe Standard |