The ornamental design for a keyboard, as shown and described.
FIG. 1 is a perspective view of the keyboard, showing an example of the keyboard as part of an exemplary notebook computer; and,
FIG. 2 is a top view of the keyboard, showing an example of the keyboard as part of an exemplary notebook computer.
The claimed design is understood to consists only of the top surfaces of the five keys that are shown and the graphics appearing thereon, and the broken lines shown surrounding the keys in solid line in the figures represent the bounds of the claimed design, while all other broken lines are directed to the environment and form no part of the claimed design.
The broken lines shown surrounding the keys in solid line in the figures represent the bounds of the claimed design, while all other broken lines are directed to the environment and form no part of the claimed design.