PPSC Past Paper Junior Clerk S & GD-2019 solved MCQs, Computer MCQs, PPSC Solved Past Papers MCQsIn computing what does DOS stand for? Posted on April 22, 2021 by Rana TahirA. Data Only System B. Disk Only System C. Data Operating System D. Disk Operating SystemShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)