| Acronym | Meaning |
 | BHD | Bahraini Dinar (ISO 4217 Currency Code) |
| BADD | Battlefield Awareness And Data Dissemination |
| PLO | Palestine Liberation Organization |
| SDSS | Sloan Digital Sky Survey |
| IDN | Indonesia (ISO 3166 Trigram) |
| ECT | ElectroConvulsive Therapy |
| SIN | Sinhalese Language (ISO 639-2 Code) |
| AO | Angola (FIPS 10-4 Country Code; ISO 3166 Digram) -Approach Officer (submarine) - Area Of Operations |
| PAFC | Plymouth Argyle Football Club |
| 4D | Four-dimensional (usually Three Spatial Plus One Temporal Dimension |
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