The mark consists of the letters "PDS" in lower case and navy blue on the right. On the left are three (3) trapezoidal figures, overlapping, and in descending perspective from the left side to the right side. The largest trapezoid, on the right, has the color of royal blue. Its shape is vertical, with its left side approximately one-third longer than the right side, and its width approximately one-half the length of the left side. The angle of decline from the top left side to the top right side is approximately the same as the angle of ascent from the bottom of the left side to the bottom of the right side, with the perspective effect of an unseen vanishing point to the right. The second trapezoid, in the color cyan, is to the left of, and partially behind, the largest trapezoid. The second trapezoid is approximately a quarter small than the largest trapezoid. The right side of this middle trapezoid is in the shadow of the largest trapezoid, and the right half of this middle trapezoid is shaded to a darker cyan. The third trapezoid, on the far left, is the smallest and is partially behind and to the left of the middle trapezoid. It is approximately a quarter smaller than the middle trapezoid. This smallest trapezoid is in silver, with about half of its right side in the shadow of the middle trapezoid and appearing in a darker silver.