STL

STL may refer to:

Communications

• Standard telegraph level
• Studio/transmitter link
• Small transmitting loop antenna (a.k.a. magnetic loop)

Geography

• St. Louis, Missouri

International law

• Special Tribunal for Lebanon, an international criminal tribunal underaking the prosecution of the persons responsible for the attack resulting in the assassination of Rafic Hariri

Music

• Stella Mwangi, a Norwegian-Kenyan singer also known as STL

Software

• Standard Template Library (for C++)
• State logic, a PLC programming language
• .stl, a file format for subtitles
• STL (file format), a file format used to represent 3D CAD models in stereolithography and other solid freeform fabrication technologies
• Statement List, programming language for Siemens SIMATIC S7

Sports

• St. Louis Blues, the city's National Hockey League team
• St. Louis Cardinals, the city's Major League Baseball team

Transportation

• St. Louis Lambert International Airport (IATA airport code: STL)
• Société de transport de Laval, public transit in Laval, QC Canada
• Société de transport de Lévis, public transit in Lévis QC Canada
• Réseau de transport de Longueuil, sometimes erroneously called the Societe de transport de Longueuil, or STL

Other uses

• Sacrae Theologiae Licentiatus (Licentiate of Sacred Theology), a degree in Roman Catholic religious studies
• Samarbeidsrådet for Tros- og Livssynssamfunn (Council for Religious and Life Stance Communities), a Norwegian ecumenical body
• Send the Light, a British Christian book distributor
• Slime Time Live, a television series that aired on Nickelodeon from 2000 to 2003
• Space Technology Laboratories, a former division/subsidiary of TRW Inc., taken over by Northrop Grumman in 2002
• Spurious trip level, a measure of the spurious activations of a safety or alarm system
• Standard Telecommunication Laboratories, a former British research institution