CT or ct may refer to:
A CT scan, also known as computed tomography 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 the Greek κτείς kteis "comb" and φέρω pherō "to carry"; commonly known as comb jellies) comprise a phylum of invertebrate animals that live in marine waters worldwide.
The CTV Television Network (commonly referred to as CTV) is an English-language broadcast television network in Canada 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.
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.
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 console.