(business) A corporate officer of a corporation, company, or agency, responsible for executing decisions of the chief executive officer (CEO) according to their decided schedule; often initialised as COO.

A terminal node in phylogenetic analysis; an organism.

plural of floating point operation

plural of operational service period

plural of freight operating company

plural of train operating company

(UK, rail transport) A company that runs freight trains on the national railway network in Great Britain under license from the government.

(UK, rail transport) A company that operates passenger trains on the mainline railway network in Great Britain under franchise or license from the Government.

plural of operating room table

An operating table.