1. Acronym for Document Content Architecture. A formatting guideline used in IBM’s Systems Network Architecture (SNA) that enables the exchange of text-only documents between differing types of computers. DCA provides for two types of document formatting: Revisable-Form-Text DCA (RFTDCA), which allows for modification of formatting, and Final-Form-Text DCA (FFTDCA), which cannot be modified. See also DIA, SNA.
2. Acronym for Directory Client Agent. See DUA.