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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.

Puzzle pieces coming together to form a computer screen

15 resources for new users and longtime fans of this free operating system.
Happy Halloween ASCII art on FreeDOS

Generate colorful ASCII art from a C program using either Linux or FreeDOS.
Globe up in the clouds

An interview with FreeDOS Project founder Jim Hall on communicating effectively around the world.
Person typing on a 1980's computer

Throughout its nearly 30-year journey, FreeDOS has been the modern DOS.
Filing cabinet for organization

There's a version of tar on FreeDOS, but the de facto standard archiver on DOS is Zip and Unzip.
Woman sitting in front of her computer

Programming in C on FreeDOS is very similar to C programming on Linux.
Files in a folder

Here's how I transfer files between my FreeDOS virtual machine and my Linux desktop system.