00394nam a22001217a 4500020001000000082001300010100003900023245004600062260003600108300003000144500002000174650007800194  a(pbk)  a004bHAM  aHamayun Mian, DraSohail Aslam, Dr  aComputer Sciencebpitb notes for class xi  aLahorebKhalid book depotc2000  a95 p.b: ill.c; 23.5 cm.  aIncludes index.  aComputer ScienceaSystem softwarevWindow operating systemsvSecurityvFC