alpha Z and the Ewald energy define the electrostatic

interaction of the ions in a compensating electron gas.

The alpha Z component deals with the divergent parts (G=0).

The following parts are the Hartree and exchange correlation energy as

defined in the Kohn-Sham Hamiltonian. The entropy part stems from the

smearing (using the free energy as variational parameter, electronic entropy),

EBANDS from Kohn-Sham eigenvalues, and EATOM is the reference energy for the potential (which is defined in the POTCAR file).

Furthermore, you find a documentation of the respective terms of the Schroedinger

equation in the handouts of the VASP-workshop,

http://cms.mpi.univie.ac.at/vasp-workshop
especially in the session about dft (download especially

comput_mat.pdf, dft_introd.pdf, and accuracy.pdf (p.4 for EATOM))