Why a $25 PC? Because it's the price of a textbook

salcan writes: There is growing interest surrounding the Raspberry Pi Foundation and their promise of a PC that will cost just $25. We’ve seen how the OLPC has struggled to deliver a $100 laptop for developing countries, and yet Raspberry Pi is confident in delivering the $25 PC by November this year. Eben Upton, director of the foundation, recently gave a talk at Bletchley Park regarding Educating Programmers, which focused on the thinking behind the $25 PC.