An office or institution providing telegraphic services, a place from which one could send a telegram (a historical kind of electronic message).

plural of line officer

(US) A commissioned officer who exercises general command authority and is eligible for operational command positions.

A physician who is learning a specialty as part of a housemanship.

(UK) A person employed to give advice to people, especially young people, about which career to choose.

(military) An officer above the rank of colonel.

Synonym of school resource officer

plural of resource officer

A building in which mail is collected together, then sorted prior to delivery.

plural of sorting office