"The theory of computer science is maths, but the practice is a craft, like carpentry."
"World's cheapest computer gets millions tinkering", Judith Evans, PhysOrg
In other words, you can know all about designing a house, but you have to know a lot about carpentry, electrical work, and more to actually build a house.
The author loses a few maths points; she used "almost infinite". If you are almost to infinity, then that means infinity has an end. But infinity means without end.
The computer is called the Raspberry Pi, and the producers web site is http://www.raspberrypi.org/
A bonus quote from the Raspberry Pi website: "SD cards don't last forever! Always have at least one backup of any data important to you."
