00401nam 2200668 4500001000400000003002300004005000900027008004100036082001100077072001500088100001500103260001500118250000600133245002200139650001500161650002300176650002200199668StarLibrary Marc Built20180430201711 ||||| |||||||||||amh  a005.43 aAND MS-DOS aC. Ritchie bBPB c1993 a6 aOperating systems aAND MS-DOS aINCORPORATING UNIX aOPERATING SYSTEMS