Whether black-and-white or white-and-black, separating the whole and half tones into repeating patterns of 12 notes makes it much easier for a pianist to play and to find the right notes on the full ...

Apple's black Mac mouse, for example, retails for $99, higher than the $79 of the white variant.The Black Magic Trackpad costs $149, and the Black Magic Keyboard retails for $199.. Going hands on ...