000 00257nam a2200097Ia 4500
008 230901s9999 xx 000 0 eng d
100 _aSINGH (CHARANJEET)
245 0 _aOPearting System FUMDAMENTELS
260 _bkalyani publisher (kp)
942 _2ddc
_cSCIENCE
999 _c19884
_d19884