L3

L3, L03, L.3 or L-3 may refer to:

In arts and media

 * Live, Loud & Local, a show launched by band The Matches in the Oakland, California region
 * Leprechaun 3, a film
 * L3-37, a droid in Solo: A Star Wars Story
 * Lower third, in television and film a graphic overlay placed in the title-safe lower area of the screen.

Businesses

 * L3 Technologies, a company that provided intelligence, surveillance, and reconnaissance systems prior to a merger with Harris Corporation to form L3Harris Technologies in 2019
 * DHL De Guatemala (IATA code L3), a cargo airline based in Guatemala
 * LTU Austria (IATA code L3), an airline based in Austria

Biology and medicine

 * L3, the third lumbar vertebra, in human anatomy
 * the third larval stage in the Caenorhabditis elegans worm development
 * ATC code L03 Immunostimulants, a subgroup of the Anatomical Therapeutic Chemical Classification System
 * Haplogroup L3 (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup generally found in East Africa

Computing and telecommunications

 * L-3, an L-carrier cable system developed by AT&T
 * L3 microkernel, a microkernel operating system by German computer scientist Jochen Liedtke
 * The Level-3 CPU cache in a computer
 * ISO/IEC 8859-3 (Latin-3), an 8-bit character encoding
 * L3 technical support, the highest level dealing with the most difficult or advanced problems.

Air- and spacecraft

 * Aeronca L-3 Grasshopper, a light airplane used by the USAAF during World War II
 * Avia L.3, an Italian plane used for training by the Regia Aeronautica
 * Macchi L.3, a 1916 Italian biplane flying boats
 * Soyuz 7K-L3, a crewed lunar lander design type in Russia's Soyuz space program
 * N1/L3, the Soviet crewed lunar landing program

Other modes of transportation

 * L3/33 and L3/35, Italian tankettes used in World War II
 * L03, a Chevrolet Small-Block engine model
 * Soviet submarine L-3, a 1931 Leninets class minelayer submarine
 * SP&S Class L-3, an 1883 steam locomotives class
 * L3 (New York City bus), a temporary bus route in New York City
 * LNER Class L3, a class of British steam locomotives
 * The Kingsford branch of the CBD and South East Light Rail in Sydney, Australia, is numbered L3

Other uses in science and technology

 * L3, a form of low-alloy special purpose steel
 * L3 (CERN), one of the four detectors of the Large Electron-Positron Collider
 * L3 (length^3), volume
 * The third Lagrange Point in a gravitational system
 * Latitude/Longitude Locator, an STS-32 Space Shuttle mission experiment