I remember going to OfficeDepot and looking at the Performas and they along had like six different models with six different model numbers. Something like 6510, 6511, 6512, 6514, 6515, etc. (I know the actual numbers were different. These are to illustrate my point.) There were just very subtle differences between the models but for whatever reason, it warranted a different number. Basically it was a nightmare trying to remember what was the difference between any two numbers. That whole scheme of trying to provide a range of configurations was a flop. Fortunately, Steve undid that and cut down the product line into four basic models. I, for one, welcomed that.