Architecture - unacms/una GitHub Wiki
Core consists of some basic files like utilities, base classes, interfaces. Objects are helper classes which provide high level interface for some functionality. Plugins are 3rd-party libraries. Modules are separate, complete, independent piece of code which can be added or removed at any time.
M - Model, *Db
classes
C - Controller, *Module
classes
V - View, *Templ*
classes and files in /template/
folder.