| Acronym | Meaning |
 | PSI | Portable Source Initiative |
| ISMB | International Society Of Matrix Biologists |
| IPW | Interrogation Of Prisoners Of War |
| SIGMET | Significant Meteorological Information |
| OPCON | Operational Control |
| ISCCP | International Satellite Cloud Climatology Project |
| LIFO | Last In |
| DMI | Desktop Management Interface (computing) |
| IEW | Intelligence And Electronic Warfare |
| WAAC | Women's Army Auxiliary Corps (WWII UK) |
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