TLS

TLS may refer to:

Computing

 * Transport Layer Security, a cryptographic protocol for secure computer network communication
 * Thread level speculation, an optimisation on multiprocessor CPUs
 * Thread-local storage, a mechanism for allocating variables in computer science
 * Transparent LAN Service, a transparent data link connecting remote Ethernet networks

Media

 * Theaterlexikon der Schweiz, an encyclopedia about theatre in Switzerland
 * The Times Literary Supplement, a British weekly literary review
 * Town Life Stuff, one of The Sims 3 Stuff packs

Organisations

 * Telstra (ASX code), an Australian telecommunications and media company
 * Trans Link Systems B.V., a company delivering the OV-chipkaart system to public-transport operators in the Netherlands.
 * Transmitter Location Systems, a US satellite radio interference geolocation company

Education

 * The Lindsey School, a secondary school in Cleethorpes, North East Lincolnshire, England
 * Tallinn Law School, in Estonia
 * Torrey Life Science, a biology organization of the University of Connecticut, US
 * Trinity Law School, in Santa Ana, California, US
 * Trinity Lutheran School (disambiguation), several schools in the US
 * Tulane University Law School, in New Orleans, Louisiana, US

Science, medicine and technology

 * Thüringer Landessternwarte Tautenburg, the Karl Schwarzschild Observatory, in Tautenburg, Thuringia, Germany
 * Terrestrial laser scanning, a 3D laser scanning method
 * Total least squares, a statistical analysis
 * Translesion synthesis, a form of DNA repair
 * Transponder landing system, an airplane landing system
 * Tumor lysis syndrome, a group of metabolic complications that can occur after treatment of cancer
 * Tunable laser spectrometer, an instrument in the Mars rover suite Sample Analysis at Mars
 * Two-level system, a quantum system

Transport

 * Thorpe-le-Soken railway station, Tendring, England (National Rail station code)
 * Toulouse–Blagnac Airport (IATA code)

Other uses

 * East Timor (IOC code)