CTA =
California Teachers Assoc
Chicago Transit Authority
Cellulose triacetate
Chain transfer agent
Charge transfer amplifier
Computed tomography angiography
Cherenkov Telescope Array, a project to build a system of very high energy gamma ray telescopes.
Constant temperature anemometry
Conditioned taste aversion,
The medical jargon "Clear to auscultation," for lungs are clear when listening
Now which one am I speaking with again?