... may tinh hoac internet. De xir ly cac thdng tin dang sd, he thd'ng thdng tin phai sir diing cac phuang tien, va cdng nghe mdi dd la may tinh, ky thuat tin hgc, cdng nghe thdng tin. ... thdng tin cd sii' diing may tinh va cdng nghe thdng tin dugc ggi la mot he thd'ng tin hgc (phan dudi chung tdi se md ta chi tiet ban ve he thd'ng tin hgc). b) Xii ly thong tin ... tay hay bang may tinh). d phan nay ta mdi xem xet den vai trd ciia may tinh trong cac viec xir ly thdng tin dd. Dinh nghla: He thd'ng tin hgc la he thd'ng thdng tin ma viec xir ly,...