An embedded system is a computer system that is dedicated to running a single task.

Setting up an embedded system with FreeDOS requires defining a minimal DOS environment that runs just a single application.

Here's a demonstration to set a simple game to run at boot instead of the shell:

“Set up an embedded system with FreeDOS”
🌐 https://www.both.org/?p=8843

*Another way to do it is to run the app from autoexec, but this shows that any program can be a shell program, if you need it.