The OS
Usually, one of the first groups of these instructions is a special program called the operating system, which is the software that makes the work to the computer. It informs the user (or other machines) for the input and commands, reports the results of these commands and other operations, stores and manages data, controls the sequence of operations of software and hardware. When the user requests to run a program, the operating system loads the program into the computer’s memory and runs the program. Popular operating systems like Microsoft Windows and Macintosh (Mac OS) have graphical user interfaces (GUI)-using small images or icons to represent files and commands. To access these files or commands, the user clicks with the mouse over the icon or presses a key combination on your keyboard. Some operating systems allow users to perform these tasks through voice, touch, or other input methods.