5.to prevent hackers to reach their networks or files and to prevent the robberys to steal in the business man's/woman's company.
2.An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware.
1.Computer is an electronic device which is used to store the data, as per given instructions it gives results quickly and accurately.
sorry yan lang kayang sagutan.pa heart po.
