research and development phase, and the financial return during its "vital life" Thin-layer chromatography, a chromatography technique used in chemistry to separate chemical compounds Total lung capacity, refers to the volume of air associated with different phases of the respiratory cycle Triple-level cell, a type of flash memory Tank Landing Craft, a British WWII landing craft, US called Landing craft tank Triple lumen catheter Other uses Toluca International Airport (IATA airport code TLC), Mexico Toyota Land Cruiser, an automobile See also Tender Loving Care (disambiguation) TLS (disambiguation)