CTA may refer to:
Ctags is a programming tool that generates an index (or tag) file of names found in source and header files of various programming languages.
CTA International is an equal-shares joint venture company between defence companies Nexter and BAE Systems.
Cancer/testis antigen 1 is a protein that in humans is encoded by the CTAG1B gene.
Cutaneous T-cell lymphoma-associated antigen 5 is a protein that in humans is encoded by the CTAGE5 gene.
Ribosomal RNA-processing protein 7 homolog A is a protein that in humans is encoded by the RRP7A gene.
Apache cTAKES: clinical Text Analysis and Knowledge Extraction System is an open-source natural language processing system for information extraction from electronic medical record clinical free-text.
The CTA Holiday Train is a Chicago 'L' train which traditionally runs during the winter holidays, from November to December.
In astronomy, CTA 102, also known by its B1950 coordinates as 2230+114 (QSR B2230+114) and its J2000 coordinates as J2232+1143 (QSO J2232+1143), is a quasar discovered in the early 1960s by a radio survey carried out by the California Institute of Technology.
CTAB may refer to: