| Acronym | Meaning |
| ITA | Italy (ISO 3166 Trigram) |
| MRC | Maintenance Requirements Card |
| AMSU | Association For Managers In Students' Unions - Aviation Mat?riel Screening Unit |
| LGBT | Lesbian |
| GUI | Graphical User Interface (goo-ey) |
| COPE | U.K. Committee On Publication Ethics |
| DFB | Deutscher Fu Ball-Bund (German For German Football Association) |
| CCOC | Canadian Children's Opera Chorus |
| HR | Croatia (FIPS 10-4 Country Code; ISO 3166 Digram) -Harvard Revised Star Catalogue - Human Resources |
| OR | Operating Room (surgery) - Operational/Operations Research -Oregon (postal Symbol) |