[genericid]

"Das Keyboard" is grammaticaly correct, but useless when you need the letters i-z.

[CrystalGamma]

Yes but it refers to an electronic musical keyboard, not a computer keyboard, which is indeed „Tastatur”.

[taejo]

Hence "i-z" (in Germany the notes of the chromatic scale go up to H; the German H = English B, Germany B = English B-flat).