With the lightening pace of PC tech development, we sometimes end up with old systems (but still perfectly usable) cluttering our basements or garages. What to do? We don't need to drive them to a landfill or junkshop. Check out this organizations that takes your old PCs and donates them where they are needed. Some are based in the US, some in UK.
http://www.cristina.org/
http://www.africaleadership.org/Computer%20Rebuilding%20Project.htm
http://www.free-computers.org/
http://www.giftsinkind.org/
:)