I was not able to find "Monitor Off" feature on any notebook while are using external keyboard. Lots of PCs have no "Hibernate" button even if this feature is turned on. Working on computers using remote desktop software disallows many of system shortcuts. You cannot switch Num Lock or Scroll Lock if there is no hardware buttons for that. And so on...
I've created small software utility to have all missing features right under the hand. Missing Buttons is software for Windows, maybe I'll create a Mac OS version in the future.
The product is distributed as try before you buy, the license costs $9.95 per user.
If you have ideas for other "missing buttons", let me know. I'll add them into the future versions.