Files with the DSY extension denote a project file created in the AJC Directory Synchronizer. DSY files contain log files that have a listing of the files that have been synchronized. The DSY files store information relating to programs that are stored on a machine, allowing for improved system management. DSY files may be opened with the appropriate software tools.
Video format used by Besta devices, such as the Besta Electronic Dictionary; similar to a Flash (.SWF) file, but uses proprietary formatting that is only recognized by Besta hardware.