HighCountryGuitar.com Mini-Clinic #2: The CAGED system (lesson 4 of 5: Useful chord voicings from CAGED). The CAGED system is an elegantly simple way of mapping out the neck of the guitar using the basic chord shapes of C, A, G, E, and D. It's very simple, but it can be applied to even the most complex musical ideas. Take your guitar playing to new heights!