Keyboard

FIG. 1 shows a top, front perspective view of a keyboard showing our new design;

FIG. 2 shows top, rear perspective view thereof;

FIG. 3 shows a top plan view thereof;

FIG. 4 shows a bottom plan view thereof;

FIG. 5 shows a front elevation view thereof;

FIG. 6 shows a rear elevation view thereof;

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

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

The broken lines depict portions of a keyboard in which the design is embodied that form no part of the claimed design.