We claim the ornamental design for a computing device, as shown and described.
FIG. 1 is a front perspective view of a computing device in an opened state;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a front perspective view of the computing device in a closed state;
FIG. 9 is a top plan view of the computing device of FIG. 8;
FIG. 10 is a bottom view of the computing device of FIG. 8;
FIG. 11 is a front view of the computing device of FIG. 8;
FIG. 12 is a rear view of the computing device of FIG. 8;
FIG. 13 is a right side view of the computing device of FIG. 8; and,
FIG. 14 is a left side view of the computing device of FIG. 8.
Dash-dash broken lines in the drawings are environmental lines while any short dash-long-dash lines are boundary lines, neither of which are part of the claimed design.