000 00296nam a2200133Ia 4500
100 _aIBM
942 _cBK
654 _aDisk Operating System
245 _aDisk Operating System Version-3.20
260 _bIBM Corpor.
_aFlordia
_c1986
082 _a621.3
_bIBM
546 _aENGLISH
999 _c30432
_d30432