Q:Product listing - Multiple Categories

[wooha]

This Q isnt pertaining to stealth. How is it that sellers are able to list their product under multiple categories?

You look at their products "Amazon BSR" and it shows their like #1,2,3 in 3 different product categories.

I suppose its through some way by uploading through the inventory file?

And blah blah, yea yea, we know its not technically allowed, but lets move past that, this is a stealth forum

Thanks for any direction.