We claim the ornamental design for a keyboard of a hand-held electronic device, as shown and described.
FIG. 1 is a front elevational view of a keyboard of a hand-held electronic device; and,
FIG. 2 is a perspective view thereof.
The broken lines are directed to environment and are for illustrative purposes only; any boundary created by the broken lines is unclaimed; the broken lines and the areas that are bounded by broken lines form no part of the claimed design.
The stippled shading shown on portions of the keyboard in FIGS. 1 and 2 represents color contrast.