First Raspberry Pi computers to be delivered

Costing only £16, the tiny computer has been designed to inspire anyone, especially children, to get started with computer programming.

Delivery of the first batch of production machines has been delayed twice - once because the wrong component was soldered on to circuit boards and a second time thanks to confusion about electromagnetic testing.

The Pi is built around the Arm chip that is used in the vast majority of mobile phones. It runs one version of the Linux operating system and uses SD cards as its storage medium.