Names of piano keys

 
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Almost every modern piano has 52 white keys and 36 black keys for a total of 88 keys (seven octaves plus a minor third, from A0 to C8). Many older pianos only have 85 keys (seven octaves from A0 to A7). The highest-quality piano manufacturers extend the range further in one or both directions. http://en.wikipedia.org/wiki/Piano_keys#Keyboard