(Australia, film classification) Initialism of Check The Classification (that is given to films to allow advertising prior to their official classification)

Comb-shaped.

(Internet slang, text messaging) Abbreviation of can't talk now.

Abbreviation of carton.

Abbreviation of center. (building or organization) / Abbreviation of counter. (thing that counts)

(Internet) Initialism of client-to-client protocol. / (Internet) Initialism of Compound TCP.

(footwear) Initialism of composite toe and composite plate.

(zoology) A respiratory system, in the form of a comb, in some molluscs / (zoology) A row of spines in some insects

(games) Initialism of capture the flag. / (inorganic chemistry) Initialism of chlorine trifluoride. / Initialism of counter-terrorist (or terrorism) financing.

(pathology, neurology) Initialism of chronic traumatic encephalopathy. / (physics) Initialism of coefficient of thermal expansion. / (databases, countable) Initialism of common table expression.