00564nam a22001811 4500 1/2259 930930s1987 xxu 001 0 eng d 2359 DLC GR-PeUP 001.64'25 DA Davis, William S. Operating systems a systematic view / William S. Davis.- 3rd ed.- Reading : Addison-Wesley, c1987. x, 539p.: fig. ; 24 cm. Index Operating systems (Computers). INST UNIPILB MAIN 20040709 001.64'25 DA 00120721 00120721 LOAN 0 1