| Acronym | Meaning |
 | LDC | Lesser Developing/Developed Country |
| HMS | Helmet-mounted Display - Her Majesty's Ship (Royal Navy) |
| XAF | BEAC (Banque Des ?tats De L'Afrique Centrale) Central Africa CFA (Coop?ration Financi?re En Afrique Centrale) Franc (ISO 4217 Currency Code) |
| YAC | Youth-Adult Committee |
| PCCIP | President's Commission On Critical Infrastructure Protection |
| AISB | (British Society For The Study Of) Artificial Intelligence And The Simulation Of Behaviour |
| ACORN | Association Of Community Organizations For Reform Now |
| OBS | Observation/Observer - Obsolete - Obstacle -Off Balance Sheet - Optical Burst Switching (IEEE) - Organic Brain Syndrome - Organization(al) Breakdown Structure |
| MIB | Men In Black - Mint In Box (Internet Auction/trading Listings) |
| YL | Yoctolitre |
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