A new starter kit for Raspberry Pi, including a keyboard and mouse, has been released to celebrate the success. The kit also includes an SD storage card, official case, power supply, HDMI cable, mouse, keyboard and guidebook - it costs £99 plus VAT and will be available in the coming weeks.
Company founder Eben Upton wrote in his bog that he thought they might sell 10,000 units during the product’s lifetime and were a little surprised about the product's success.
"There was no expectation that adults would use Raspberry Pi, no expectation of commercial success and certainly no expectation that four years later we would be manufacturing tens of thousands of units a day in the UK and exporting Raspberry Pi all over the world."
The mini-PCs are being used for more than just teaching kids how to assemble PCs. They are useful for setting up smart houses and other settings. One was even used in the hacker drama Mr Robot to bring down eVil corp by triggering the heating systems.