Linux based Raspberry Pi sold out yesterday and crashed makers Premier Farnell or RS Components websites. The revolutionary PC is the size of a credit card and features a USB port for a keyboard, Ethernet port, SD card slot, and an HDMI port for video output. “The idea”, says Eben Upton, the founder of the charity behind the scheme, “is to give one away to every child as they reach a new school year so that they can do their own programming and learn to control computers, rather than be controlled by them.”

Powering the Raspberry Pi is an ARM chip, like ones found in mobile phones and tablets, and it runs a version of the Linux operating system found in many web servers and in Android smartphones.

The Raspberry Pi Foundation isn’t looking to get rich selling the devices. It will only make a “small profit” from each Raspberry Pi sold, which “we’ll be putting straight back into the charity,” according to its website.