Keyboard

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

FIG. 2 is a top perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a left-side elevation view thereof; and,

FIG. 8 is a right-side elevation view thereof.

Broken lines seen in the drawings depict portions of the keyboard that form no part of the claimed design.