Handguns are guns that can be used with a single hand, and are the smallest of all firearms. However, the legal definition of a "handgun" varies between countries and regions. For example, in South African law, a "handgun" means a pistol or revolver which can be held in and discharged with one hand. In Australia, the gun law considers a handgun as a firearm carry-able or concealable about the person; or capable of being raised and fired by one hand; or not exceeding . In the United States, Title 18 and the ATF considers a handgun as a firearm which has a short stock and is designed to be held and fired by the use of a single hand.