Regina is a software package for low-dimensional topologists. This package contains the components of Regina designed to run large parallel computations on a high-performance cluster using MPI.

These components are built against the default implementation of MPI, and must be run under the default MPI runtime environment (as found in the package mpi-default-bin).

Regina focuses on the study of 3-manifold and 4-manifold triangulations, normal surfaces, and angle structures. For Regina's standard graphical user interface, and for more information about what Regina can do, see the package regina-normal.