| Acronym | Meaning |
| RH | Relative Humidity |
| PIP | Plant Instrumentation Program |
| SPOM | STS Planning And Operations Management |
| UPS | Uninterruptible Power System |
| CMOS | Complementary Metal Oxide Silicon |
| PSI | Pounds Per Square Inch (Static Pressure) |
| CCS | Computer Core Segment |
| GSEL | Ground Support Equipment List |
| P | Pressure |
| LN2 | Liquid Nitrogen |