What is "usar"

USAR or U.S.A.R. may refer to:

• United Speed Alliance Racing (now Rev-Oil Pro Cup Series), a car racing series in the United States
• United States Army Rangers, the elite component forces of the United States Army
• United States Army Reserve, the reserve component forces of the United States Army
• Urban search and rescue, rescue operations inside structures or other confined spaces
• USA Rugby, the governing body of Rugby union in the United States