An air officer is an air force officer of the rank of air commodore or higher. Such officers may be termed "officers of air rank". While the term originated in the Royal Air Force, air officers are also to be found in many Commonwealth nations who have a similar rank structure to the RAF. Air officers holding command appointments receive the title Air Officer Commanding (AOC), whereas air officers holding commander-in-chief positions are titled as Air Officer Commanding-in-Chief (AOC-in-C).