The ornamental design for a monitor for dataprocessingdevice, as shown and described.
1. Monitor for data processing device
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Right
1.6 : Top
1.7 : Bottom
1.8 : Perspective
1.9 : Enlarged
This article is a monitor having four screens which are arranged perpendicularly; reproduction 1.9 is an enlarged view of reproduction 1.8; the dot-dash broken lines in reproduction 1.9 form no part of the claimed design.