LR

LR is an abbreviation with multiple meanings:
*The ISO 3166-1 alpha-2 country code for Liberia
*The Aerodrome Identification Letters for RAF Little Rissington
*The IATA code for Lacsa/TACA airline
*Lactated Ringer's solution, an intravenous fluid
*Land Rover
*Legislative route
*LR parser, or left-to-right, rightmost-derivation parser
*"Late Registration", rapper/producer Kanye West's second album
*Latus rectum, a line segment parallel to the directrix through the focus of a conic section
*Long Range (Aerospace)
*Lightning Rod, a device used to divert and ground lightning
*Line Rider, a flash toy by Boštjan Čadež (also known as fšk)
*"The Lord of the Rings", a novel by J. R. R. Tolkien and its subsequent adaptations
*"The Lost Road and Other Writings", part of "The History of Middle-earth" book series by Christopher Tolkien
*Lexical resource
*"Logan's Run" 1967 novel that has spawned multiple adaptations and sequels in literature, film, television, and comic books.
*Lloyd's Register