It’s a single circuit board the size of a credit card with no screen or keyboard, a far cry from the smooth tablets that dominate the technology market.
But the world’s cheapest computer, costing just $25, has astonished its British creators by selling almost 1.5 million units in 18 months.
The Raspberry Pi is now powering robots in Japan and warehouse doors in Malawi, photographing astral bodies from the United States and helping to dodge censorship in China.
Upton and his colleagues first thought of creating a cheap computer suited to programming when they were teaching computer science at Cambridge University.
They noticed that children of the wired generation lacked the day-to-day experience of coding that was so formative for the computer geeks who grew up in the 1980s.
“They didn’t have the grungy familiarity with the dirty bits, the hacking,” Upton told AFP.
“The theory of computer science is math, but the practice is a craft, like carpentry.”