Dirac (software)
Dirac (named after Paul Dirac; own notation DIRAC) is a relativistic ab initio quantum chemistry program. The full name is Program for Atomic and Molecular Direct Iterative Relativistic Allelectron Calculations, in short PAM DIRAC. It is capable of calculating various molecular properties using the Hartree–Fock, MP2, density functional theory, configuration interaction and coupled cluster electronic structure theories. Dirac is one of the most successful generalpurpose quantum chemistry packages that provides accurate description of relativistic effects in molecules, using the Dirac equation as its starting point.^{[1]} The program is available in source code form, at no cost, to the academic community.
Developer(s)  T. Saue, L. Visscher, H. Jensen, R. Bast, A. Gomes 

Stable release  DIRAC19

Operating system  Linux, Microsoft Windows, macOS 
Type  Computational chemistry 
License  Academic 
Website  www 
The most recent version, DIRAC19, was released on December 12, 2019.
See alsoEdit
ReferencesEdit
 ^ Reiher, Markus (2006). "Douglas–Kroll–Hess Theory: a relativistic electronsonly theory for chemistry". Theoretical Chemistry Accounts. 116: 241–252. doi:10.1007/s0021400500032.