DOS

磁盘操作系统(Disk Operating System)

doorknob, doorman, doormat, doornail, doorpost, doorstep, doorstop, doorway, dope, dopey (also dopy), Doric, dorm, dormancy, dormant, dormer, dormitory, dormitory town, dormouse, dorsal, dory, dosage, dose, doss, doss-house, dosser, dossier, dot, dot matrix, dotage, dote, doting, dotingly, dotted line, dottiness, dottle, dotty, double, double agent, double back, double bed,