000 00257nam a2200109Ia 4500
008 230901s9999 xx 000 0 eng d
100 _aShishodia (Ys)
245 0 _aoperating system
250 _a1
260 _bUNIVERSITY BOOK HOUSE
942 _2ddc
_cSCIENCE
999 _c17133
_d17133