Is this an A class thread or F-18 thread....just kidding.
What is the origin of the name "A Class"? I know there are C Class cats, so there must be a B class (maybe D, too)?? Can someone edumacate me on what the class distinctions? Remember, I am from Alabama....speak slowly.
The first few paragraphs of this article wil give you the answer.
http://en.wikipedia.org/wiki/A-Catamaran 
