There are many keyboard shortcuts that remain unchanged across operating systems and applications alike.
These normally include shortcuts that aid in general functioning, editing and navigation.
There are many other shortcuts that differ from one operating system to another, and even vary by desktop environment and/or application.
With this in mind, I present to you today a cheat sheet of KDE-specific keyboard shortcuts, some of which may overlap other applications, but all of which I have tested and confirmed as of KDE version 4.14.25.