United States Air Force (Governmental » Military)
United States Air Force (Academic & Science » Ocean Science)
United States Air Force (Academic & Science » Meteorology)
United States Air Force (Governmental » Transportation)
United States Air Force (Governmental » NASA)
United States Air Force (Governmental » US Government)
* United System Administrators Force (Miscellaneous » Science Fiction)
* U Sorry Airborne Females (Miscellaneous » Funnies)
Abbreviations dictionary. 2012.