This review is for the SECOND version of this calculator, the slightly-larger, grey, BLACK and white model, with a rounded "mound" housing the keypad.  I had actually ordered the older model -- the light-grey model, with the blue and white keys, slightly smaller, which I had had previously, but sadly lost.  I had considered returning this newer model, but finally decided against it, as it is now listed as being discontinued by the manufacturer, so -- if I returned the newer one I did get, I very well might have gotten the same model back..........