Our coffee maker instructions often refer to a "cup" of coffee. These cups are whats marked on the side of the coffee maker showing how much water is in the reservoir. The instructions never define what a "cup" actually equates to. It appears to about 6 oz. An old coffee maker seems to also have had this definition of "cup". The coffee beans we got from the local coffee shop also have instructions indicating one scoop of beans per 6 oz cup.
To be clear -- Is a "cup" to a coffee maker always 6oz? and therefore it has nothing to do with the Imperial unit "cup" which is 8oz? Its more a notion of a typical serving size of coffee?