| Acronym | Meaning |
 | NA | Sodium |
| BN | Battalion |
| BN | Brunei (ISO 3166 Digram; FIPS 10-4 Country Code) |
| Q2 | Second Quarter |
| NIEHS | National Institute Of Environmental Health Sciences |
| UFO | Unidentified Flying Object - United Farmers Of Ontario |
| PLF | Parachute Landing Fall |
| ICMP | Internet Control Message Protocol |
| MLWS | Mean Low Water Springs (nautical Charts) |
| USGS | United States Geological Survey |
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