Cnet: British game developer David Braben and his colleagues at a non-profit organization have put together a bare-bones PC that fits in your pocket and costs about $25. Essentially, the device consists of an ARM processor with a USB port at one end (for connecting to a keyboard) and an HDMI connection at the other end (for connecting to a monitor.) The whole thing is about the size of a USB thumb drive.
The PC comes equipped with open source software, including Ubuntu Linux, Iceweasel, KOffice, Python. The foundation says the PC will be helpful "for use in teaching computer programming to children."