CoffeeOS is a free, open source operating system powered by the language Java. It runs on any computer in the terminal or command line, and in the microkernal. The goal is to create a free OS that can run anywhere, any time, any way.
CoffeeOS is able to run on any device, and here are the instructions on how to.
Windows
To run CoffeeOS on a Windows computer, enter the command line and go to the directory CoffeeOS is in. Then, type in:
C:\myfolder> dir
C:\myfolder> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
C:\myfolder> javac coffeeos.java
C:\myfolder> java coffeeos
This should open CoffeeOS in a new window.
Linux