| Acronym | Meaning |
 | PFO | Pissed |
| CJO | Chief Of Joint Operations |
| ICZN | International Code Of Zoological Nomenclature - International Commission On Zoological Nomenclature |
| BDOS | Basic Disk Operating System; Part Of CP/M |
| CFAR | Christine's - Federal Acquisition Regulation |
| PGP | Pretty Good Privacy |
| SIN | Sinhalese Language (ISO 639-2 Code) |
| FRO | Faroe Islands (ISO 3166 Trigram) |
| ASIC | Aviation Security Identification Card |
| FDDI | Fibre Distributed Data Interface |
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