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FreeDOS is an open source operating system which is compatible with MS-DOS and applications designed for this older operating environment. If you've got a legacy application that you want to keep running, whether it's a classic game, an embedded system, or simply an old application, FreeDOS can help you do it.

Learn how to get started or download this handy cheat sheet for FreeDOS.

4 different color terminal windows with code

Armed with just two commands DIR and CD, you can navigate your FreeDOS system from the command line.
Old UNIX computer

It looks like retro computing, but it's a modern OS you can use to get stuff done.
Computer screen with files or windows open

Batch files are a great way to write your own simple programs and automate tasks that normally require lots of typing.
woman on laptop sitting at the window

Learn how to make, remove, copy, and do other things with directories and files in FreeDOS.
Files in a folder

Learn how to create, edit, and name files in FreeDOS.
A map with a route highlighted

Master the DIR command to navigate your way around FreeDOS.
Looking at a map for career journey

Learn about your FreeDOS path, how to set it, and how to use it.
FreeDOS fish logo and command prompt on computer

Use this FreeDOS cheat sheet to help you remember how to use the most common FreeDOS commands.