| Acronym | Meaning |
| MRD | Material Review Disposition |
| CORE | Common Operational Research Equipment |
| NL | NNL No Limit |
| ESA | European Space Agency |
| SSPD | Shuttle System Payload Definition (Study) |
| SDIF | Software Development And Integration Facility |
| SDH | System Development Handbook |
| GSO | Ground Systems Operations |
| DUM | Dummy |
| EWA | Estimated Warehouse Arrival |