AFDS= Auotpilot/Flight Director System.
FCC= Flight Control Computer, a "Black box" in which resides the computational circuity for both the a/p and the f/d.
All of the computations for both systems are the same, but one output is used for the f/d and another for the a/p.
L C and R= Left Centre and Right ie the 3 separate A/P'S AND F/D,S