00439nam a2200157Ia 4500008004100000020001500041082001500056100001600071245002000087250000700107260004500114300003200159500001900191600002100210650005000231240925s9999    xx            000 0 und d  a1878058258  a005.43 GOO  aGookin, Dan 0aDOS for Dummies  aNA  aCalifornia:bIDG Books Worldsidec,1991.  axviii,292l.p.bNAfOriginal  aIncludes Index  aComputer Science  aComputer science, information & general works