LR

LR is a 2-letter acronym which may refer to:

Codes

• LR, the ISO 3166-1 alpha-2 country code for Liberia
• LR, the Aerodrome Identification Letters for RAF Little Rissington
• LR, the IATA code for Lacsa/TACA airline

Science and technology

Science

• Lr, the symbol for Lawrencium in the periodic table of elements
• Latus rectum, a line segment parallel to the directrix through the focus of a conic section
• L(R) (pronounced L of R) in set theory

Technology

• LR(k) (Left-to-right, Rightmost-derivation with k symbols of lookahead), a type of parser for deterministic context-free grammars
• Lexical resource, a database consisting of one or several dictionaries
• Lactated Ringer's solution, an intravenous fluid
• Lightning Rod, a device used to divert and ground lightning
• .22 Long Rifle, a type of rimfire cartridge ammunition

Arts

• 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
• Logan's Run, 1967 novel that has spawned multiple adaptations and sequels in literature, film, television, and comic books
• Late Registration, rapper/producer Kanye West's second album

Places

• Little Rock, Arkansas, the capital of Arkansas

Companies, products and trademarks

• Land Rover, a British car manufacturer
• Lloyd's Register, a maritime classification society and independent risk management organisation
• Adobe Photoshop Lightroom, photo editing software
• Lego Racers, a product line (or theme) of the construction toy Lego
• Line Rider, an internet physics toy

Others

• Legislative route, In United States, a highway defined by laws passed in a state legislature
• Live rock, rock from the ocean that has been introduced into a saltwater aquarium

See also

• Long Range (disambiguation)
• Left and right (disambiguation)