FIG. 1 is a left-front perspective view of a portion of a computer input device showing our new design;

FIG. 2 is a right-rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a left-front perspective view of a second embodiment of a portion of a computer input device that is a substantial mirror image of the portion of a computer input device of FIGS. 1-7; and,

FIG. 9 is a right-rear perspective view of the portion of the computer input device of FIG. 8.

The unshown bottom of the computer input device does not form part of the claimed design. The broken line showing of the remainder of the computer input device is for illustrative purposes only and forms no part of the claimed design.