Cabinet files are used to organize installation files that are copied to the user's system.
APK – Android package: Applications installable on Android package format of the Alpine Linux distribution.A - An external file extension for C/C++.?Q? – files that are compressed, often by the SQ program. These types of files are not available anywhere, as they haven't been released yet.
arc files for Nintendo which can be opened on PC by these files. ?mn - is a custom file made by Team Gastereler for making it easy to open.