St. Louis, Missouri, USA

Steel is an alloy consisting mostly of iron, with a carbon content between 0.2 and 1.7 or 2.04% by weight (C:1000–10,8.67Fe), depending on grade. Carbon is the most cost-effective alloying material for iron, but various other alloying elements are...

Lambert-St. Louis International Airport (IATA airport code: STL)

Standard Template Library (for C++)

Standard Telecommunication Laboratories, the research laboratory of Standard Telephones and Cables, where pioneering work on fibre optics was done.

Slime Time Live, a television series that aired on Nickelodeon from 2000 to 2003

Société de transport de Laval, public transit in Laval, QC Canada

Réseau de transport de Longueuil, sometimes erroneously called the Societe de transport de Longueuil, or STL

Licentiate of Sacred Theology

St. Theresa of Lisieux Catholic High School, located in Richmond Hill, ON, Canada

Studio/transmitter link

State logic, a PLC programming language

Standard telegraph level

The St. Louis Cardinals baseball franchise in the MLB

The St. Louis Rams football franchise in the NFL

The St. Louis Blues hockey franchise in the NHL

The Society For Truth And Light, a Christian conservative group in Hong Kong

STL (file format), a file format used to represent 3D CAD models in stereolithography and other solid freeform fabrication technologies