We claim the ornamental design for a computing device, as shown and described.
FIG. 1 is a top perspective view of a computing device in an open state;
FIG. 2 is a top perspective view of the computing device of FIG. 1 in a closed state;
FIG. 3 is a top plan view of the computing device of FIG. 2;
FIG. 4 is a sectional view of the computing device of FIG. 1 taken along line 4-4; and,
FIG. 5 is a sectional view of the computing device of FIG. 1 taken along line 5-5.
The dash-dash broken lines in the drawings are environmental lines which do not form part of the claimed design. The short dash-long dash lines are boundary lines which do not form part of the claimed design. The shading represents a translucent glass material.