00382nam a2200145Ia 4500008004100000020002200041041000800063082001500071100001700086245002900103250001400132260004600146650002500192700001900217230711s9999||||xx |||||||||||||| ||und||  a978-93-272-3934-7  aENG  a5.42bSI-A  aGurdas Singh 0aAdvance operating system  a1st . Ed.  c2014aNew DelhibKalyani Publishers House  aComputer Engineering  aMohanjit Singh