David Braben, best known for the Rollercoaster Tycoon, has created a pint-sized wrist computer for the developing world. 

To work the system, all one needs to do it plug a USB-based keyboard and mouse setup into the USB 2.0 port on the opposite end of the Pocket PC’s HDMI port. Additional storage comes in the form of an SD card slot on the side of the tiny computer. And that’s it: $25 for a fully functional Linux PC that fits in one’s pocket.