The document discusses the Raspberry Pi, a low-cost ($30), credit-card sized computer created by the Raspberry Pi Foundation to promote teaching computer science in schools. It compares the EDSAC 1 computer from 1947 with 3,000 vacuum tubes to today's computers like the NVIDIA Kepler with 3.5 billion transistors. The Raspberry Pi provides a flexible, low-power platform for learning about computing in a creative and fun way that can help the UK's competitiveness by teaching essential computer science skills.