A portion of the disclosure of this patent document contains material to which a claim of copyright protection is made. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but reserves all other copyrights whatsoever.

The single FIGURE is a front view of a portion of a computer screen with an image of a keyboard. The perimeters of the underlying portion of a computer screen and the image of a keyboard are understood to be flush.