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MICROSOFT DISK OPERATING SYSTEM (MS DOS)



Disk Operating System is a set of computer programs and it is popularly known as DOS. The main functions of DOS  are to manage disk files, allocate system resources according to the requirement. DOS provides features essential to control hardware devices such as Keyboard, Screen, Disk  Devices,  Printers, Modems and programs.
What is File ?

In computer terminology, a file is a collection of text, data or information stored on a storage device, such as hard disk, floppy disk, or CD/DVD.

What is directory ?
A directory is nothing but what we call a folder. It is a named space or section of the storage area of the disk which is need to store files. The directory serves the purpose of organizing the files in a better manner.


Some DOS Commands ::

cls - to clear the screen 
date - to see or adjust the current date
time - to see or adjust the current time
md - to make a directory
cd - to enter into the directory
copy - to copy a file or folder
move - to move a file from one directory to another
dir - to display the directory list 
rmdir - to remove the directory
ren - to rename a file or directory
delete - to delete a file
dir/p - to display the directory list page-by-page
dir/w - to display the directory list wide format / width wise
dir/ad - to display the directory list of directories and not files 
dir/ah - to display the list of hidden files and directories
dir/on/p - display the directory list in ascending alphabetical order by name and page-by-page. 
dir/o-n/p - display the directory list in ascending alphabetical order by name and page-by-page. 
dir/o-n/p – display the directory list in descending asalphabetical order by name and page-by-page.
dir/od/p – display the directory list in ascending order by date and page-by-page.
dir/o-d/p – display the directory list in descending order by date and page-by-page.
dir/os/p – display the directory list in ascending order by size and page-by-page.
dir/o-s/p – display the directory list in descending order by size and page-by-page.
dir/oe/p – display the directory list in ascending alphabetical order by extension and page-by-page.
dir/o-e/p – display the directory list in descending alphabetical order by extension and page-by-page.
dir/o/p – display the directory list in ascending alphabetical order by name first and then the list of files in ascending alphabetical order by name.




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