A DIG file is a data file used by select versions of Digilink radio broadcast automation software. It may contain various information in text format, such as schedules, system passwords, clock settings, and activity logs.

You will most likely only encounter the files if you are in the radio broadcasting industry and use Digilink software, such as Digilink 2 or 3. However, DIG data files are obscure nowadays, since the versions that supported the files have been superseded by other versions of Digilink software.