Then a shift to Roman numerals with Acrobat X and XI. And now: Acrobat DC, which is just Acrobat XII/12 with a new name. The free viewer, long named “Adobe Reader,” is now “Adobe Acrobat Reader DC.”. “DC” stands for “Document Cloud,” Adobe’s new cloud service for signing and saving PDFs that Adobe hopes will “revolutionize the way the world works with documents.”.