Files that contain the .rem file extension are usually encrypted files that are stored on a BlackBerry mobile device. The REM files may contain a number of file types and will normally include the original file extension before the .rem extension. For example, a JPEG image saved as a BlackBerry encrypted file may appear as filename.jpg.rem.
In some instances the .rem extension is also given to files created by the ACT! database software application. The REM files associated with the ACT! database program contain the application's database maintenance files. As the database is maintained, the REM files are automatically updated.
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