| Acronym | Meaning |
 | PRI | Puerto Rico (ISO 3166 Trigram) |
| GSK | GlaxoSmithKline |
| APDS | Armour-Piercing |
| ATGW | Anti-Tank Guided Weapon |
| UNDE | Union Of National Defence Employees (Canada) |
| NAAQS | National Ambient Air Quality Standards |
| NAVNET | Navy Network |
| RCT | Randomized Controlled Trial - Robotically Controlled Telescope |
| MOT | Ministry Of Transport (UK) |
| DSS | Digitized Sky Survey - Discarding-Sabot Shell (ammunition) |
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