00486cam a2200157 a 4500020001500000082001700015100002200032245009000054250001200144260004100156300003300197650001500230650003100245650002800276700002400304  a007248464000a658.4038 SAW1 aSawyer, Stacey C.10aUsing information technology : A Practical Introduction to Computers & Communications  a5th ed.  aBoston :bMcGraw-Hill/Irwin,cc2003.  axxvii, 324 p. :bcol. ill. ; 0aComputers. 0aTelecommunication systems. 0aInformation technology.1 aWilliams, Brian K.,