00487nam a2200193Ia 4500008004100000020001500041082001800056100002000074245004300094250000600137260003800143300000800181650001600189650001400205653002100219653002200240653000900262700002200271170901s1988    xx            000 0 und d  a9813091037  a001.642bG90U  aGroff, James R. 0aUnderstanding UnixbA Conceptual Guide  a2  aUSAbQue Corporation Carmelc1988  a234  aGneralities  aKnowledge  aComputer systems  aOperating systems  aUNIX  aWeinberg, Paul N.