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Flag commissioned officers
	Armies, air forces (non-Commonwealth)	Navies, coast guards	Air forces (Commonwealth system)
	Field marshal or Marshal or Captain general	Admiral of the fleet	Marshal of the air force
	General or colonel general or army general	Admiral	Air chief marshal
	Lieutenant general or army corps general	Vice admiral	Air marshal
	Major general or divisional general	Rear admiral or Counter admiral	Air vice-marshal
	Brigadier or brigadier general	Commodore or flotilla admiral	Air commodore
Senior commissioned officers
	Colonel	(Ship-of-the-line) Captain	Group captain
	Lieutenant colonel	Frigate captain or Commander	Wing commander
	Major or commandant	Corvette captain or Lieutenant commander	Squadron leader
Junior commissioned officers
	Captain	Lieutenant	Flight lieutenant
	First lieutenant or lieutenant	Lieutenant junior grade or sub-lieutenant	Flying officer
	Second lieutenant or junior lieutenant	Ensign or midshipman	Pilot officer
	Officer cadet	Officer cadet	Flight cadet
Non-commissioned officers
	Warrant officer or sergeant major	Warrant officer or chief petty officer	Warrant officer
	Sergeant	Petty officer	Sergeant
Enlisted ranks
	Corporal or bombardier	Leading seaman	Corporal
	Lance corporal or Lance bombardier or Specialist	Able seaman	Leading aircraftman or Air specialist
	Private or gunner or trooper or sapper	Seaman	Aircraftman or airman or aviator

Officer cadet is a rank held by military cadets during their training to become commissioned officers. In the United Kingdom, the rank is also used by members of University Royal Naval Units, University Officer Training Corps and University Air Squadron; however, these are not trainee officers with many not choosing a career in the armed forces.^[1]^[2]

The term officer trainee is used interchangeably in some countries.

^ Cite error: The named reference cuas was invoked but never defined (see the help page).
^ "University Officer Training Corps About Us". Ministry of Defence. Archived from the original on 2 December 2008. UOTCs are military units but it is not about training students for war. Many UOTC members do go on to join the UK Armed Forces, both full and part time, but the majority have no further contact with the forces after they graduate.