000 00344nam a2200157Ia 4500
100 _aWalia, Ekta
080 _a001.61
526 _dTB
526 _aPG
366 _f#REF!
942 _cBK
245 _aOperating system concepts 2nd ed.
260 _aKhanna book publishing co.(p) ltd.
_bNew Delhi
_c2019
300 _axx,340
546 _aE
999 _c57082
_d57082