| Acronym | Meaning |
| UCR | University Of Costa Rica |
| HU | Hungary (ISO 3166 Digram; FIPS 10-4 Country Code) |
| OLS | Operational Linescan System |
| MDF | Main Distribution Frame - Medium-Density Fibreboard |
| HMD | Heard And McDonald Islands (ISO 3166 Trigram) |
| HQDA | HeadQuarters |
| PDG | President Director General - Product Development Group |
| POCD | Post-Operative Cognitive Dysfunction |
| NGH | Northern General Hospital |
| DLPFC | DorsoLateral PreFrontal Cortex |