The Officer Commanding (OC) is the commander of a sub-unit or minor unit (smaller than battalion size), principally used in the United Kingdom and Commonwealth. In other countries, the term Commanding Officer is applied to commanders of minor as well as major units. Normally an Officer Commanding is a company, squadron or battery commander (typically a Major). However, the commanders of independent units of smaller than company size, detachments and administrative organisations, such as schools or wings, may also be designated Officers Commanding.