Keyboard

FIG. 1 is a perspective view of a keyboard showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left view thereof; and,

FIG. 8 is a right view thereof.

The broken lines shown in the drawings depict portions of the keyboard that form no part of the claimed design.