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

• 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.

• 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

• 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

• 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.

• 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

• 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

• 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

• 3L (disambiguation)
• LLL (disambiguation)
• Level 3 (disambiguation)
• L band, radio frequencies in the electromagnetic spectrum

Topics referred to by the same term

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