CT or ct may refer to:
A CT scan or computed tomography scan (formerly computerized axial tomography scan or CAT scan) makes use of computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting.
H. P. Lovecraft created a number of deities throughout the course of his literary career, including the "Great Old Ones" and aliens, such as the "Elder Things", with sporadic references to other miscellaneous deities (e.g.
Ctenophora (; singular ctenophore, or ; from Ancient Greek: κτείς, romanized: kteis, lit. 'comb' and φέρω, pherō, 'to carry'; commonly known as comb jellies) comprise a phylum of invertebrate animals that live in marine waters worldwide.
CTrain is a light rail transit system in Calgary, Alberta, Canada. It began operation on May 25, 1981 and has expanded as the city has increased in population.
The CTV Television Network (commonly referred to as CTV) is a Canadian English-language terrestrial television network launched in 1961. Since 2000, it is owned by the CTV Inc.
Ctrl (pronounced "control") is the debut studio album by American singer SZA. It was released on June 9, 2017, on Top Dawg Entertainment and RCA Records.
Color Television Interface Adaptor (CTIA) and its successor Graphic Television Interface Adaptor (GTIA) are custom chips used in the Atari 8-bit family of computers and in the Atari 5200 home video game console.