| Acronym | Meaning |
 | RIP | Relief In Place -requiesca[n]t In Pace (Latin For May He/she/they Rest In Peace) |
| PRI | Puerto Rico (ISO 3166 Trigram) |
| GSS | Generic Security Services |
| HMS | Helmet-mounted Display - Her Majesty's Ship (Royal Navy) |
| SONAR | SOund Navigation And Ranging |
| EU | Europium |
| ATI | Allied Telesyn International |
| UNSM | Union Of Nova Scotian Municipalities |
| ACAS | Aboriginal Children's Advancement Society - Advisory |
| IHH | Idiopathic Hypogonadotropic Hypogonadism |
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