PARSEC is a computer code that solves the Kohn-Sham equations by expressing electron wave-functions directly in real space, without the use of explicit basis sets. It uses norm-conserving pseudopotentials (Troullier-Martins and other varieties). It is designed for ab initio quantum-mechanical calculations of the electronic structure of matter, within density-functional theory.
P - Pseudopotential
A - Algorithm for
R - Real
S - Space
E - Electronic
C - Calculations
Read More
____________________
The more you lose yourself in something bigger than yourself, the more energy you will have!! 
