I know the fine differences, but in practice it's nearly the same as "free beer":

"You may have paid money to get copies of free software, or you may have obtained copies at no charge. But regardless of how you got your copies, you always have the freedom to copy and change the software, even to sell copies."
[source: http://www.gnu.org/philosophy/free-sw.html]

That means, if Coca Cola would deliver me their soft drink together with their recipe (open source), I would be able to change their recipe or leave it the same and sell my own product with it. Personally I have no problem, if they would decide to do something like that, but I'm not sure how much employees would be fired after that. Not every freedom comes without a price.

Remi