TLS

TLS may refer to:

Computing

* Transport Layer Security, successor to Secure Sockets Layer (SSL)
* Thread-local storage, a mechanism for allocating variables in computer science
* Thread Level Speculation (also known as speculative multithreading), a dynamic parallelization technique that depends on out-of-order execution to achieve speedup on multiprocessor CPUs
* Transparent LAN Service, a transparent data link connecting remote Ethernet networks
* Triple L Society, LIVE LIFE LAVISH

Medicine

* Tumor lysis syndrome, a group of metabolic complications that can occur after treatment of cancer
* Translesion synthesis, a form of DNA repair

Technology and science

* Transmitter Location Systems, LLC, creators of first commercial satellite geolocation system
* Transponder Landing System, an airplane landing system
* Two-state quantum system, also known as Two Level System (TLS)
* Telephone line simulator

chools

* Topeka Lutheran School, in Topeka, Kansas, USA
* Trinity Law School, in Santa Ana, California, USA
* Tulane Law School, in New Orleans, Louisiana, USA
* The Lindsey School, a secondary school in Cleethorpes, North East Lincolnshire.

Other uses

* Thesaurus Linguae Sericae, a study of the Chinese language
* The Times Literary Supplement, a weekly literary review
* TOC Lean Six Sigma, a management methodology
* Total Least Squares, a statistical analysis method
* True Love Story, a video game

TLS may also stand for:
* The IATA code for Toulouse Blagnac International Airport
* The IOC code for East Timor
* The ASX code for Telstra