Librettist - MARC relator code - Library of Congress (LCCP)
Air Liberte Tunisie - Tunisia - ICAO designator (FAAC)
Chemical Laboratory Technician - or Technology - Navy
H. A. Long Boat Works, Olympia, WA - Manufacturer code for watercraft hull identification number (USCG)
Labatt - John Ltd. - Toronto Stock Exchange symbol - Vancouver Stock Exchange symbol
Labete - Solomon Islands - Seismograph station code, US Geological Survey (SEIS)
Lachi - Language symbol (ETLW)
Land-Based Tanker - Aircraft (DOMA)
Large Binocular Telescope
Launch Base Test (ACAE)
Laurel Brown - Horse racing entrants (HRTC)
L-Band Tetrode
L-Band Transmitter
LBT - NCIC trailer make code
Lean Best Torque - Automotive engineering
Light-Beam Transmissometer (PDAA)
Linear Beam Tube
Listen Before Talk (SAUO)
Local Battery Telephone - Telecommunications (IAA)
Local Bus Target (SAUO)
Long-Baseline Tiltmeter - For earthquake study
Low Back Tenderness - Medicine (DMAA)
Low Bandpass Transformer
Low BIT - Binary Digit Test - Computer science (IEEE)
Lumberton, NC - Location identifier - FAA (FAAL)
Lupus Band Test - Medicine
Lutheran Bible Translators (EA)
Pounds Thrust - NASA (KSC)
Pound Troy
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