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DOS, is your answer

In a DOS environment, you can change directories using the cd command. For example, to change to a directory named MyClasses, you type cd MyClasses and press Enter.

What is the purpose of DOS?

The reason of a disk running machine is to allow the pc to switch the statistics saved on a magnetic disk to some other a part of the pc: its predominant reminiscence is referred to as RAM (Random Access Memory), the video display screen or the printer.

The DOS surroundings is a reserved section of number one reminiscence known as the Master Environment Block. The surroundings is used to shop machine statistics withinside the shape of environmental variables, or environmental strings.

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