| Acronym | Meaning |
 | HFAC | Human Factors (aytchfak) |
| IO | British Indian Ocean Territory (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| BZP | Benzylpiperazine |
| HFE | Human Fertilisation And Embryology (UK Act) |
| WNA | World Nuclear Association |
| OA | Operational Analysis |
| PSV | Philips Sport Vereniging (Dutch For Philips Sports Union) - Public Service Vehicle |
| HMMWV | High Mobility Multipurpose Wheeled Vehicle (hum-vee; Hummer) |
| NIMA | National Imagery And Mapping Agency (became NGA) |
| DGD&D | UK Directorate General Of Development And Doctrine |
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