000 00296nam a2200121Ia 4500
008 220201s2017 xx 000 0 eng d
100 _aWalia, Ekta
245 0 _aOperating system concepts 2nd. Ed.
250 _a2
260 _aNew Delhi
_bMcGraw Hills
_c2017
300 _a340
942 _2ddc
_cREF
999 _c64251
_d64251