| Acronym | Meaning |
 | MCSF | Marine Corps Security Forces |
| DND | Department Of National Defence (Canada) - Do Not Disturb |
| LPC | Linear Predictive Coding |
| ORBAT | Order Of Battle |
| ATA | Advanced Technology Attachment (IBM Personal Computer) - Afghan Transitional Authority - Allen Telescope Array -Antarctica (ISO 3166 Trigram) |
| UL | Underwriters Laboratories |
| GEV | Ground Effect Vehicle |
| OB | Obedience - Obligation - Obligatory - Obsolete - Obstetrics -Ocean Beach (California) - Off Break (cricket) - Old Bryanstonian - Order Of Battle - Outlet Box (electrical) -Overbought (stock Market) -Oversight Board |
| PKR | Pakistani Rupee (ISO 4217 Currency Code) |
| BBB | Better Business Bureau - Blood-Brain Barrier |
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