Files with qci file extension are phonebook indexes used in old Cliq program for Linux/Unix.
There is one other file type using
the QCI file extension!
.qci - Massively Parallel Quantum Chemistry Program file
QCI file extension - Cliq accessories phonebook index
What is qci file? How to open qci files?
File type specification:
The qci file extension is mainly related to older program called Cliq that was used mainly on Unix or Linux OS.
Most likely obsolete and no longer used. Originally developed by Quadratron Systems.
This qci 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.