00488nam a2200157Ia 4500008004100000020001600041082001500057100002300072245006700095250000800162260004200170300002800212500001900240600002100259650005000280240925s9999    xx            000 0 und d  a11822004001  a005.44 DIG  aResearch Digital - 0aDR Dos 6.0: operating system for personal computers user guide  a2nd  aCalifornia:bDigital Researchc,1991.  axix,428p.bNAfOriginal  aIncludes Index  aComputer Science  aComputer science, information & general works