A "One Laptop Per Child" machine. The XO comes from the project's logo that depicts a person's body as an "X" with an "O" on top for the head. See OLPC. XO laptops use a custom Red Had Fedora OS ...
On Sale For $150: One Laptop Per Child Is Now ... Fuseproject Unwraps The Third-Gen One Laptop Per Child With the XO-3, OLPC unveils a design that will allow it to be customized for myriad markets.