000 00249nam a2200109Ia 4500
008 220601s2015 xx 000 0 eng d
100 _aCHOPRA, RAJIV
245 0 _aOPERATING SYSTEM
250 _a4TH Ed.
260 _c2015
_bS. CHAND
942 _2ddc
_cBCA
999 _c3883
_d3883