JL explained

JL or Jl may refer to:

Companies, groups, organizations

Japan Airlines (IATA airline designator JL)
JL Audio, a manufacturer of consumer audio products
Jefferson Lines, an intercity bus company in the Midwestern United States
Jonos, Ltd., a defunct computer systems company
Junkers-Larsen, a defunct U.S. aircraft company
John Lewis, a department store
Jaunais laiks, or New Era Party, a Latvian political party
Popular Unity (Poland) (Polish: Jedność Ludowa, JL), a defunct agrarian party in Poland, that operated in 1923, and in 1926

Jean-Luc (givenname) abbreviated "J-L" or "J.L."
JL Skinner (born 2001), American football player
Justin Langer (born 1970), former Australian cricket player
Jerry Lynn (born 1963), former American pro-wrestler, with the ringname "Mr. J.L."
Jared Leto (born 1971), American actor and Musician
Justinas Lekavičius (born 1999), Lithuanian esports player, better known as "jL"

, local trains on the Jōban Line in Japan
Jeep Wrangler (JL), model JL of the Wrangler line from Jeep, an SUV beginning production in 2018
Saviem JL, a series of heavy trucks from Saviem

Justice League, superheroes in DC Comics
Chinese military technology:
- JL-2 (missile)
- JL-8 (aircraft)
- JL-10A (radar system)
.jl, the file extension for source code files of the Julia (programming language)