000 00246nam a2200097Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aHANSEN (PER BRICH)
245 0 _aOPERATING SYSTEM PRINCIPLES
260 _bPRENTICE HALL OF INDIA
942 _2ddc
999 _c94481
_d94481