| Acronym | Meaning |
 | AGL | Above Ground Level |
| IPK | Inupiaq Language (ISO 639-2 Code) |
| CTSS | Compatible Time-Sharing System |
| NLW | Non-Lethal Weapon |
| ERP | Engineer Regulating Point |
| ECU | Ecuador (ISO 3166 Trigram) -European Currency Unit (ancestor Of The Euro) |
| LOD | Limit Of Detection - See Detection Limit |
| SF | Fleet Submarine (retired US Navy Hull Classification) -San Francisco - Science Fiction -South Africa (FIPS 10-4 Country Code) -Speculative Fiction - Special Forces |
| RMA | Return Mailing Authorization - Revolution In Military Affairs |
| SNCB | Soci?t? Nationale Des Chemins De Fer Belgique (French For Belgian Railways National Society) |
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