| Acronym | Meaning |
| USIA | United States Information Agency |
| WACC | Weighted Average Cost Of Capital (accounting) |
| BUAV | British Union For The Abolition Of Vivisection |
| FOR | Field Of Regard - Frame Of Reference |
| IRS | U.S. Internal Revenue Service |
| YK | Yoctokelvin |
| OC | Occitan Language (ISO 639-1 Code) |
| AS | American Samoa (postal Symbol; ISO 3166 Digram) - Australia (FIPS 10-4 Country Code) |
| ARI | Acute Respiratory Infection - U.S. Army Research Institute For The Behavioral And Social Sciences |
| GLV | Manx Language (ISO 639-2 Code) |