officers' mess

офіцерська їдальня ('We were most hospitably entertained by the Officers' Mess.' - ‘My Early Life’ by Winston Churchill)

battalion mess section

board of officers

company (grade) officers (Co Off)

company grade officers

field grade officers

general and flag officers

junior grade officers

mid-grade officers

officers and men

officers’ staterooms

Reserve Officers' Training Corps (ROTC)

non-commissioned officers

Armor Reserve Officers Training Corps

Canadian Forces Warrant Officers Academy

visiting officers' quarters

non-commissioned officers and enlisted ranks

Air Force Reserve Officers' Training Corps