Thank you very much for all the info! Very useful, especially the PDFs!

I need some full hardware schematic about the CPU, GPU, ram memory and all the hardware, because I would like to improve the operating system that is recommended for it. Thank you in advance!

If I would buy a Raspberry PI model B, how can I get some complete, detailed technical documentation about it? And can you tell me how muck memory the video card has? Thank you very much!