Wow, you told it exactly like it was not. It was System 7.5, Mac OS 7.6, Mac OS 8.x, Mac OS 9.x and then Mac OS X 10.0, which is very, very strange. First, if the 'X' belongs to the name rather to the version, I'd say 'Eks' instead of 'ten' (which I actually do) - but Steve doesn't want that. He stresses the 'ten' spelling every time he's on a stage. And because the 'X' stands for 'ten' it will be gone when (whenever) we reach 11.