000 00369cam a22001337a 4500
008 180718b1993 xxu||||| |||| 00| 0 eng d
082 _aI5373 R511
100 _aRitchie, C.
245 _aOperating systems: incorporating UNIX and MS-DOS
_cby C. Ritchie
260 _aNew Delhi
_bBPB
_c1993
300 _avii, 226p
650 _aMS-DOS
650 _aOperating systems-UNIX
999 _c428904
_d428904