MS-DOS is a computer operating system by Microsoft Corporation. It stands for "Microsoft Disk Operating System".

It was popularly used in PCs before an operating system called Microsoft Windows came out and still is in some places today.

MS-DOS is a text-based operating system meaning that a user works with a keyboard to input data and receives output in plain text. Later on MS-DOS often had programs using a mouse and graphics to make work more simple and quick. (Some people still believe that working without graphics is really more efficient.)

In this application MSDOS is fully emulated. You can use it to run older games programs and also develope dos applications by using qbasic.

Emulator itself is completely developed by IronySoft.