Line O

• line of battle • line of business • line of control • line of credit • line of defence • line of defense • line of descent • line of destiny • line of duty • line of fate • line of fire • line of flight • line of force • line of gab • line of heart • line of inquiry • line of latitude • line of least resistance • line of life • line of longitude • line of march • line of merchandise • line of poetry • line of products • line of questioning • line of reasoning • line of saturn • line of scrimmage • line of sight • line of succession • line of thought • line of verse • line of vision • line of work • line officer • line one's pockets • line organisation • line organization