designation for the Stinson Model 74 observation aircraft Submarines USS L-1 (SS-40), a 1915 United States Navy L-class submarine HMS L1, a Royal Navy submarine Other Ligue 1, the top division of French football LINE1 or L1, a transposable element in DNA Lowest unique bid L1, in linguistics, a subject's first language or mother tongue L-1 Identity Solutions, a US face-recognition corporation L-1 visa, a document used to enter the United States for the purpose of work L1, an abbreviation denoting someone is a Level 1 Judge, in reference to Magic: The Gathering Bose L1 Portable Systems L=1, a lunar eclipse classification on the Danjon scale L1, the postcode for central Liverpool, a major UK city Containing L1 ATC code L01 Antineoplastic agents, a subgroup of the Anatomical Therapeutic Chemical Classification System Barcelona Metro line 1 DSC-L1, a 2004 Sony Cyber-shot L series camera model Haplogroup L1 (mtDNA), a human mitochondrial haplogroup from Africa Luxo L-1, a lamp Panasonic Lumix DMC-L1, a 2006 single-lens reflex camera See also Level 1 (disambiguation)