Address Book (Contacts) supports various file extensions. It can be used to open, edit or even convert files in various formats. The file extensions listed below are used by Address Book (Contacts). Address Book (Contacts) is designed to work with the above file extensions, so if you want to work with them you should consider installing it on your system.
List of file extensions that work with the Address Book (Contacts) software. Remember that it is not a rule that you will be able to edit all the files mentioned with the help of Address Book (Contacts). It happens that these are files that contain only data for the configuration of the Address Book (Contacts) software. Go to the file extension to learn more about it.