The Barcelona Metro (Catalan and Spanish: Metro de Barcelona) is an extensive network of rapid transit electrified railway lines that run mostly underground in central Barcelona and into the city's suburbs.
Line 9 (Línia 9 in Catalan) is a line of the Barcelona Metro network that is currently under construction, with 24 stations open in Barcelona and the El Prat de Llobregat, L'Hospitalet de Llobregat, Badalona and Santa Coloma de Gramenet suburbs, since December 2009.
HMS L9 was a L-class submarine built for the Royal Navy during World War I. The boat survived the war and was sold for scrap in 1927.
The L9 Bar Mine is a large rectangular British anti-tank landmine.
The L9A1 51 mm light mortar was a man-portable platoon-level mortar system used by the British Army from the late 1980s to 2007.
Level 9 was a British developer of computer software, active between 1981 and 1991.
LG Optimus L9 is a touchscreen Android 4G smartphone designed and manufactured by LG Electronics.
The Motorola Slvr (styled SLVR) is a series of mobile phones from Motorola, and is one of the series in the 4LTR line.
Royal Ordnance L9 is a British short-barrelled 165 mm gun used for combat engineering, particularly the demolition of defences.
Teamline Air Luftfahrt GesmbH was an airline based in Austria, which was operational from 2001 to 2004.