As you have already probably found out with older systems that don't support Office 2003, you can't view MDI (Microsoft Office Document Image) files.
MDI Viewer comes with a solution to this problem, letting you view MDI files, and also apply effects like rotation or zoom on each of the images.
Among the main functions of MDI Viewer, you can also save a MDI file in any of the following graphic formats: JPG, GIF, PNG, TIFF and BMP, and even in PDF to be able to view it in Acrobat Reader.