The ornamental design for data processingdevice, as shown and described.
FIG. 1 is a front view of a data processing device in accordance with our new design;
FIG. 2 is a rear elevational view thereof.
FIG. 3 is a left side elevational view thereof.
FIG. 4 is a right side elevational view thereof.
FIG. 5 is a top plan view thereof.
FIG. 6 is a bottom plan view thereof.
FIG. 7 is a front perspective view thereof; and,
FIG. 8 is a rear perspective view thereof.
The broken lines in the drawings are for the purpose of illustrating environmental structure and illustrate portions of the data processing device which form no part of the claimed design.