Copper in History -

Copper is compatible with connectors and other devices
http://epiforum.ru/forum/index.php?action=profile;u=51545
 
Copper: An Ancient Metal
http://www.prmaemoh.com/prboard/index.php?topic=34634.0
 
 
What is Copper Metal Used For?
http://minervaabl.be/forum/viewtopic.php?f=34&t=9099
 
Why is copper used in making electrical wires?
http://www.101skins.com.tw/forum.php?mod=viewthread&tid=5412293&page=1&authorid=11137
 
Uses of copper as an electric conductor
http://yabsyon.com/viewthread.php?tid=569031&extra=
 
Disadvantages of copper wiring
http://harmonyrsps.com/forums/showthread.php?tid=1509