Files that contain the .wp3 file extension are most commonly associated with the Photo Story software application distributed by Microsoft.
The Photo Story program, designed for Windows, is used to create digital slide shows. Using the software, users can crop, rotate, touch up and enhance their personal photos, arranging them into a decorative slide show presentation. The slide shows that are created with the software are then saved with the .wp3 file extension.
The WinPlot software program has also been known to use the .wp3 file suffix. These WP3 files contain plotting utility files that are used by the WinPlot application.
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If you have additional information about the WP3 file format or software that uses files with the WP3 suffix, please do get in touch - we would love hearing from you.