What is Putnam? All i know is that it is a mathematics competition

[kurt.physics]

What is Putnam? All i know is that it is a mathematics competition. Is it international? Who can do it? How can one do it? What credit does one get from doing it?

 

[mobe]

Information can be found http://math.scu.edu/putnam/" [Broken]: .
http://math.scu.edu/putnam/rulescJan.html" [Broken].