| Acronym | Meaning |
 | RRS | Racing Rules Of Sailing |
| IRO | International Refugee Organisation |
| DOI | Digital Object Identifier - U.S. Department Of The Interior |
| YO | Former Yugoslavia (NATO Country Code |
| RATELO | Radiotelephone Operator |
| ATAC | Air Transportable Acoustic Communications |
| AH | Ampere-hour |
| FCO | UK Foreign And Commonwealth Office |
| OCR | Optical Character Recognition |
| DB | Decibel |
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