L7

L7 or L-7 may refer to:

Music and culture

• Square (slang), from the thumbs and forefingers of two hands forming the shape "L7"
• Bustin' Out of L Seven, an album by Rick James
• L7 (band), a grunge/punk band from Los Angeles, California
• L-Seven, post-punk band from Detroit, Michigan

Science and engineering

• L7 (machine gun)
• L7-filter, a classifier for Linux's Netfilter
• Landsat 7 earth observation satellite
• Motorola SLVR L7 mobile phone
• Royal Ordnance L7 tank gun
• The L^p space for p=7

Other

• Laoag International Airlines, whose IATA airline code is L7