as a unit of organization within text files Line (video), a measure of video display resolution or image resolution Line Corporation, a Tokyo-based technology company Line (software), a social messaging application operated by Line Corporation Mathematics and geometry Line (unit), an obsolete unit of length equal to one-twelfth or one-tenth of an inch Military Land warfare Line (formation), standard tactical formation of forces Line infantry, line formation of infantrymen who were part of the "Line Regiments" 'Lines' is another word for fortifications Sea warfare Line of battle, in naval warfare, a line of warships Line officer, (naval) officer qualified to command a vessel People Line (given name), a Scandinavian female given name Line (singer) (born 1996), a Danish singer and finalist in the Danish X Factor Lines (surname) The Lines family of Birmingham, England, including: Samuel Lines (1778–1863) and his sons Samuel Rostill Lines (1804–1833) Frederick Thomas Lines (1808–1898) Henry Harris Lines (1800 or 1801–1889) Places Líně, a municipality and village in the Czech Republic Linesøya, an island in the municipality of Åfjord in Norway The Line, Saudi Arabia, a planned city in Saudi Arabia Line Islands, an island group in the central Pacific The Line (sculpture trail), based on the Greenwich Meridian, in South East and East London Science Fault line, a geological term Inbred line, either of: Inbred strain or linear organisms, model organisms that are nearly genetically identical and are used in laboratories Products of line breeding, a technique in animal and plant agriculture and horticulture Lineage (evolution), a sequence of species that form a line of descent Long interspersed nuclear element, or LINE, a DNA sequence of two non-overlapping reading frames, accounting for 21% of human DNA Maxwell (unit), the unit of magnetic flux, formerly called line Sports Flexible ligatures Fishing line, used (or intended) for angling Kite line, cord for kite flying Competitive sports Line (ice hockey), group of forwards that play in a group, or "shift", during a game Line and length, direction, and distance, to first bounce on the pitch, in delivery in cricket Line of scrimmage, in American and Canadian football Racing line, in auto racing, path taken through a corner Transport Airline, a company that provides air transport services for traveling passengers and freight Log-line, in nautical usage, a piece of rope which has been assigned a function Shipping line, a company engaged in sea transport Railway line, a railway route