| Acronym | Meaning |
 | PADI | Professional Association Of Diving Instructors |
| HR | Croatia (FIPS 10-4 Country Code; ISO 3166 Digram) -Harvard Revised Star Catalogue - Human Resources |
| MANPADS | MAN-Portable Air Defence System |
| FLAC | Free Lossless Audio Codec. |
| OS | Osmium |
| SDR | Strategic Defence Review |
| MLB | Major League Baseball |
| JB | Junior Branch |
| IMO | In My Opinion - International Maritime Organization |
| FUD | Fear |
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