DCA stands for Diploma in Computer Applications. ... This includes the study of various computer applications such as Internet Applications, Database Management System, MS Office, Operating System, HTML, among others. The aim is to make the student's technology-friendly by teaching them the above applications. DCA (Diploma in Computer Application) Jobs, Scope, Career, Govt. Jobs. There are plenty of opportunities for DCA qualified students in both the government and private sectors and one can explore the job sectors by being sure to not receive less than INR 2 to 5 lakhs per annum