The ornamental design for a shelf, as shown and described.
This application is related to a U.S. utility patent application entitled “Shelf for a Desktop Computer,” U.S. application Ser. No. 14/450,138, and filed on then same date as this application. The contents of that application are incorporated by reference herein in their entirety.
FIG. 1 is a perspective view of a shelf, illustrating my new design.
FIG. 2 is a top plan view of the shelf;
FIG. 3 is a bottom plan view of the shelf;
FIG. 4 is a rear elevational view of the shelf;
FIG. 5 is a front elevational view of the shelf; and,
FIG. 6 is a side elevational view of the shelf, the two sides of the shelf being mirror images of one another.
The broken lines in the drawings immediately adjacent to the claimed shaded areas of the shelf represent the boundary of the claimed design that form no part thereof. The broken lines in FIG. 1 that illustrate a monitor and stand are environment that form no part of the claimed design. The remaining broken lines in the drawings illustrate portions of the shelf that form no part of the claimed design.