Thanks to reader jlawr.
Manuals and tutorials for the EOS 5D Mark III can be uploaded on your camera and then viewed on the LCD display. The other Canon camera that comes with this feature is the EOS-1D X. Tutorials for a plenty of the camera’s functionalities are available for download (click here). This is a fine thing, since you can have all the needed references with you, on the cam, without the need of a tablet, notebook etc. The tutorials are covering autofocus settings, audio options, manual controls, compression methods, time code, and more.