Transmission line

Thallium, a chemical element

Acura TL, mid-size luxury car

Tubal ligation, one of the procedures for Sterilization (surgical procedure)

Threat level

Some mineral substances such as fluorite store energy when exposed to ultraviolet or other ionising radiation. This energy is released in the form of light when the mineral is heated; the phenomenon is distinct from that of black body radiation. The...

Turn Left (a liberal independent student publication at Cornell University)

Time-Life (magazine collection)

Airnorth, IATA airline designator

Trans Mediterranean Airways, IATA airline designator

The Times Leader, a daily newspaper in Wilkes-Barre, Pennsylvania

Tape library

in phonetics, voiceless alveolar lateral affricate

Team leader

Liquidus temperature

Transformation language

Trade last

T&L, or transform and lighting in computer graphics

Teknisk Landsforbund, the Danish Union of Professional Technicians

East Timor (ISO 3166-1 alpha-2 country code)

Tagálog language (ISO 639 alpha-2, tl)

Texas League, a Class AA league in Minor League Baseball

Tony Levin, a bass and Chapman Stick player

Transport layer (OSI reference model)

German and Dutch abbreviation for teaspoon (from Teelöffel and Teelepel)