L2

L2 or L-2 may be:
* L2 space, in mathematics
* Haplogroup L2 (mtDNA)
* SP&S Class L-2, a 1881 steam locomotives class
* Taylorcraft L-2, aircraft used by the United States Army Air Forces in World War II
* Ligue 2, in French soccer,
* The second Lagrangian point, in an astronomical Solar System
* The second lumbar vertebra of the vertebral column, in human anatomy
* The Level-2 CPU cache, in a computer
* Layer 2 of the OSI model, in computer networking
* Lynden Air Cargo IATA code
* A second language, as opposed to a first or native language or a foreign language, or a target language being learned.
* A series of fragmentation hand grenades used by the British armed forces (American M61 copies), before being replaced with the HG85
* Lineage II, the MMO game
* The second generation limiter audio effect by Waves Audio, both in hardware and software.
* The L designation given to the Sterling submachine gun in the British armed forces
* The module code for the Dungeons & Dragons adventure The Assassin's Knot
* A frequency used in GPS satellite navigation signals, see GPS signals, a newer version is the L2C frequency.
* Internet slang, standing for "learn to".