metals in computers and recycling
Common metals in pc's are aluminum, arsenic, copper, gold, iron, silver, and zinc.
Recovering metals has been one of the best economic properties for the electronic recycling.
some more metal info
One ton of circuit boards can contain at most about 1,500 grams of gold and at most 210 grams of copper. That is about 400 times the ammount of gold in gold mines in the U.S.
also about 40 times more then the ammount in the U.S.
A little on plastics
More then 6 thousand tons of plastic was recovered from electronic recyclers in 1998.
Thats about 25 percent more then in 1997.