Files with abcddb suffix are almost always contacts databases from Apple Address Book (Contacts) management software macOS / OS X.
Software that open abcddb file
ABCDDB file extension - Apple Address Book database
What is abcddb file? How to open abcddb files?
File type specification:
File extension abcddb is most likely best known for its use in Apple Address Book, an address book for Apple's Mac OS X computers with many syncing features that are integrated into rest of the OS.
A typical .abcddb file contains stored contact address book data in SQLite format.
The default software associated to open abcddb file:
Address Book (Contacts) for Mac 
Company or developer:
Apple, Inc.
The Address Book (Contacts) is a little handy application with loads of features that are often overlooked by most users. Its very useful for for organizing your contacts, but Address Book's real power is that it works with many other applications. Its an integral part of Mac OS X (macOS) operation system. From Mac OS X Mountain Lion the Address Book will be renamed to Contacts.
List of software applications associated to the .abcddb file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open abcddb file, edit abcddb file, convert abcddb file, view abcddb file, play abcddb file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting abcddb files.
Programs that can create abcddb file - Apple Address Book database
Programs supporting the exension abcddb on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Address Book (Contacts) for Mac for create abcddb file action.
