The ornamental design for a computerdesk, as shown and described.
FIG. 1 is a pictorial front view of the computer desk from a perspective
slightly above and to the right of the computer desk;
FIG. 2 is an exploded top plan view of the two horizontal surfaces of the
computer desk shown separately for convenience of illustration;
FIG. 3 is a side elevational view of the computer desk, the opposite side
being a mirror image;
FIG. 4 is a rear elevation view of the computer desk; and,
FIG. 5 is a top plan view of the computer desk, with four computer desks
shown adjacent to it in broken lines for purposes of illustration only and
forming no part of the claimed design;