A cia file extension is related to the Sheffield Dictionary files.
There is one other file type using
the CIA file extension!
.cia - Nintendo 3DS CTR importable archive
CIA file extension - Sheffield Dictionary data
What is cia file? How to open cia files?
File type specification:
The cia file extension is associated with the Sheffield Dictionary software.
The cia file stores various data used for internal purposes of the Sheffield Dictionary.
The Sheffield Dictionary seems to be obsolete product without any support from developer.
This cia file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.