| Acronym | Meaning |
| OMDR | Operations And Maintenance Data Record |
| MEP | Minimum Entry Point |
| PCO | Program Controlled Output |
| PM | PMATPage Map Address Table |
| EEE | Electronic |
| ECLSS | Environmental Control And Life Support System |
| LPG | Last Page Generator (Distribution List Used In All OMT'S) |
| ET-SEP | External Tank Separation |
| GPC | Gel Permeation Chromatograph |
| MLI | Multilayer Insulation |