Raspberry Pi is celebrating its eighth birthday, and it's come a long way in those eight years. Since launching its very first computer back in 2012, the company has sold more than 30 million units. Every year since has brought a newer version with higher specs and better processing power, with the Raspberry Pi 4 Model B arriving in 2019 with 40 times more speed than the humble original. Now, thanks to falling RAM prices, Raspberry Pi enthusiasts can get their hands on the 2GB device for $35 (around £35, depending on where you buy it) -- which is the same price as the very first version from eight years ago.