  The Chronus Quantum (ChronusQ) software package is an open source (under the
GNU General Public License v2) software infrastructure which targets the
solution of challenging problems that arise in ab initio electronic structure
theory. Special emphasis is placed on the consistent treatment of time
dependence and spin in the electronic wave function, as well as the inclusion
of relativistic effects in said treatments. In addition, ChronusQ provides
support for the inclusion of uniform finite magnetic fields as external
perturbations through the use of gauge-including atomic orbitals (GIAO).
ChronusQ is a parallel electronic structure code written in modern C++ which
utilizes both message passing (MPI) and shared memory (OpenMP) parallelism. In
addition to the examination of the current state of code base itself, a
discussion regarding ongoing developments and developer contributions will also
be provided.
