00400nam a2200145 a 450000500170000000800410001702000150005805000280007310000170010124500510011826000310016930000210020052100070022165000260022820140311163002.0020823s19uu    xx            00    eng d  a9718995145  aQA 76.9.F34b.P944 1998  aPlaza, Gerry  aPreventing PC system disasters /cGerry Plaza.  aQuezon City :bNBS,c1998.  a126 p. :c22 cm.  aIT  aComputerxmaintenance