00478nam a2200145 a 450000500170000000800410001704100080005808200120006610000230007824500450010126400460014630000260019265000620021865000520028020260717091422.0260717s1990    ii            000 0 eng d  aeng04a001.6421 aTwitty, William B.10aUNIX on the IBM PC /cTwitty, William B. 1aNew Delhi :bGalgotia Publication,c1990.  aviii, 214 p. ; 23 cm. 4aUNIX (Computer file)IBM Personal Computer -- Programming. 4aUNIX (Système d'exploitation des ordinateurs)