| Acronym | Meaning |
 | CF. | Confer (Latin Compare |
| USDA | United States Department Of Agriculture |
| PCI | U.S. Pacific Islands Trust Territory (ISO 3166 Trigram; Obsolete 1986) -Peripheral Component Interconnect (computer Bus) |
| KTS | Knight Of The Tower And Sword (of Portugal) |
| ASDIC | Allied Submarine Detection Investigation Committee (Sonar) |
| PIN | Personal Identification Number |
| RSVP | Répondez S'il Vous Plaît. A French Phrase That Translates To "please Respond" And Word For Word Translation Is "respond If You Please." It Is Standard Practice To Reply To An RSVP Request Whether Confirming Attendance Or Declining. |
| COGENT | Cognitive Objects Within A Graphical EnviroNmenT |
| ATAC | Air Transportable Acoustic Communications |
| FCO | UK Foreign And Commonwealth Office |
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