| Acronym | Meaning |
| XE | Xenon |
| AFAIK | As Far As I Know |
| LLTI | Limiting Long-Term Illness - Long Lead Time Item |
| HL | Holding Line |
| IAQ | Indoor Air Quality - Infrequently Asked Questions |
| RUC | Royal Ulster Constabulary |
| CEI | Competitive Enterprise Institute |
| MOID | Minimum Orbital Intersection Distance |
| ET | Ethiopia (ISO 3166 Digram; FIPS 10-4 Country Code) - Exatesla -Extra Terrestrial |
| CIF | Cost |