| Acronym | Meaning |
| OFDS | Oxygen Fluid Distribution System |
| PFM | Platform |
| ESS | Experiment Subsystem Simulator |
| GH2 | Gaseous Hydrogen |
| MSE | Medical Support Equipment |
| CUDS | Cumulative Data Statistics |
| FM/PM | Frequency Modulation/Phase Modulation |
| POGO | Pilot Operational EquiPment |
| HIPO | Hierarchical Input/Process Output |
| MTTFF | Mean Time To First Failure |