thong tin la tat ca nhung gi mang lai su hieu biet cho con nguoi ve the gioi xung quanh (su vat,su kien ,hien tuong,... ) va ve chinh con nguoi.3 dag thong tin co ban la
van ban
hinhanh
am thanh
2 de may tinh co the tro giup cho con nguoi trong hoat dog thong tin,cac thong tin khi dua vao may tinh can duoc bien doi thanh cac day bit (day nhi phan) bao gom hai ki hieu 0 va 1 duoc goi chung la ngon ngu may.vai tro cua bieu dien thong tin la :
viec tiep nhan , xu li,luu tru va trao doi (truyen ) thong tin duoc goi chung la hoat dong thong tin.
trong hoat dong thong tin,xu li thong tin dong vai tro quan trong
thong tin truoc xu li goi la thong tin vao
thong tin sau xu li goi la thong tin ra
qua trinh xu li thong tin trong may tinh la
thong tin vao→xu li→thong tin ra
phan mem he thong la cac chuong trinh to chuc viec quan li,dieu hanh may tinh
phan mem ung dung la cac chuong trinh dap ung nhung yeu cau ung dung cu the
de phan biet voi phan cung la chinh may tinh cung tat ca cac thiet bi vat li kem theo,nguoi ta goi phan mem may tinh la cac chuong trinh may tinh