Hardware and operating systems.         

                         

      Unit Summary

                                         Language : Computers use the binary system, which uses       

                                         only   combinations of the numbers  0 and 1.

Computers.                       Function: Data input, storing information, processing   

                                         information and data output.

                                                                        -Microprocessor

                                         Elements:               -Memories: RAM, ROM and cache.

                                                                        -Storage devices: magnetic, optical and        solid-state

                                                                       - Motherboard

                                          

                                          Functions.             -Manages the microprocessor, manages the memory and storage systems, provides an interface or working environment, and allows communication between applications and peripheral devices.

Operating system.            Examples.               –Windows, Linux, Mac OS

Computer Network.         Used to share resources and exchange information

                                         

                                          Types: Local area networks, metropolitan area networks and wide area networks.

                                          Elements: Network card in each computer, switch and transmission medium

                                          Wireless: Data is transmitted using electromagnetic waves.