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 left view thereof; FIG. 6 is a right view thereof; FIG. 7 is a top view thereof; FIG. 8 is a bottom view thereof; FIG. 9 is an enlarged view of the encircled area 9 of FIG. 1 ; FIG. 10 is an enlarged view of the encircled area 10 of FIG. 2 ; FIG. 11 is an enlarged view of the encircled area 11 of FIG. 3 ; FIG. 12 is an enlarged view of the encircled area 12 of FIG. 5 ; FIG. 13 is an enlarged view of the encircled area 13 of FIG. 8 ; and, FIG. 14 is an enlarged view of the encircled area 14 of FIG. 8 . The even-dash broken lines shown in the drawings depict portions of the keyboard that form no part of the claimed design. The dot-dash broken lines represent the extents of the enlarged detail views and form no part of the claimed design.