We covered the Raspberry Pi project back in its nascent days in 2011. The Linux-on-a-stick project aimed to give an ultra-cheap Linux personal computer running Ubuntu on an ARM processor. Since then the project has exploded thanks to strong interest from the "geekosystem" who salivated at the device's low cost and easy application to various microelectronics projects.

The Raspberry Pi Foundation has struggled to keep up with orders, at times running out of stock. To date is estimated to have sold over 1 million units since its April 2012 launch. Those units were all "Model B" versions.