| Acronym | Meaning |
 | LSE | Least Squares Estimate/Error - London School Of Economics - London Stock Exchange |
| IRAS | Infrared Astronomical Satellite |
| AR | Argentina (FIPS 10-4 Country Code; ISO 3166 Digram) - Arkansas (postal Symbol) - Armour |
| JP | Japan (ISO 3166 Digram) -Justice Of The Peace |
| COE | Cab Over Engine (see Truck) - Common Operating Environment (military) |
| EVA | Extra-Vehicular Activity |
| JCP | Java Community Process |
| FSA | Fire Support Area - UK Food Standards Agency - Functional Solution Analysis |
| XUL | XML User Interface Language |
| SK | Saskatchewan (postal Symbol) - Slovakia (ISO 3166 Digram) |
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