Question: This ab initio quantum chemistry computer program was nabed after an English chemist, physicist and what?

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Dirac (software): Dirac (named after Paul Dirac) is a relativistic ab initio quantum chemistry program.  The full name is "Program for Atomic and Molecular Direct Iterative Relativistic All-electron 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 general-purpose quantum chemistry packages that provides accurate description of relativistic effects in molecules, using the Dirac equation as its starting point.  The program is available in source code form, at no cost, to the academic community.

Vienna Ab initio Simulation Package: The Vienna Ab initio Simulation Package, better known as VASP, is a package for performing ab initio quantum mechanical molecular dynamics (MD) using either Vanderbilt pseudopotentials, or the projector augmented wave method, and a plane wave basis set.  The basic methodology is density functional theory (DFT), but the code also allows use of post-DFT corrections such as hybrid functionals mixing DFT and Hartree–Fock exchange, many-body perturbation theory (the GW method) and dynamical electronic correlations within the random phase approximation.

Yitzhak Apeloig: Yitzhak Apeloig (born September 1, 1944 in Uzbekistan) is a pioneer in the computational chemistry field of the Ab initio quantum chemistry methods for predicting and preparing the physical and chemical properties of materials.  He was the president of the Technion from 2001 until 2009 where the position was handed off to Peretz Lavie.  Distinguished Prof. Apeloig currently holds the Joseph Israel Freund Chair in Chemistry and is the co-director of the Lise Meitner Minerva Center for Computational Quantum Chemistry at the Technion.  He served as dean of the Faculty of Chemistry from 1995 to 1999, where he was named Teacher of the Year at three occasions.

ORCA (Quantum Chemistry Program): ORCA (Quantum Chemistry Program) is an ab initio quantum chemistry program package that contains modern electronic structure methods including density functional theory, many-body perturbation, coupled cluster, multireference methods, and semi-empirical quantum chemistry methods.  Its main field of application is larger molecules, transition metal complexes, and their spectroscopic properties.  ORCA is developed in the research group of Frank Neese and is free for academic use.

PySCF: PySCF is an ab initio computational chemistry program natively implemented in Python program language.  The package aims to provide a simple, light-weight and efficient platform for quantum chemistry code developing and calculation.  It provides various functions to do the Hartree-Fock, MP2, density functional theory, MCSCF, Coupled Cluster theory at non-relativistic level and 4-component relativistic Hartree-Fock theory.  Although most functions are written in Python, the computation critical modules are intensively optimized in C.  As a result, the package works as efficient as other C/Fortran based quantum chemistry program.  PySCF is developed by Dr. Qiming Sun.

MPQC: MPQC (Massively Parallel Quantum Chemistry) is an ab initio computational chemistry software program.  Three features distinguish it from other quantum chemistry programs such as Gaussian and GAMESS: it is open source, has an object-oriented design, and is created from the beginning as a parallel processing program.  It is available in Ubuntu and Debian.

John Dalton: John Dalton FRS ( ; 6 September 1766 – 27 July 1844) was an English chemist, physicist, and meteorologist.  He is best known for proposing the modern atomic theory and for his research into colour blindness, sometimes referred to as Daltonism in his honour.

Journal of Computational Chemistry: The Journal of Computational Chemistry is a peer-reviewed scientific journal published since 1980 by John Wiley & Sons.  It covers research, contemporary developments in theory and methodology, and applications in all areas of computational chemistry, including ab initio quantum chemistry methods and semiempirical methods, density functional theory, molecular mechanics, molecular dynamics, statistical mechanics, cheminformatics, biomolecular structure prediction, molecular design, and bioinformatics.

Dalton (program): Dalton (named after John Dalton) is an ab initio quantum chemistry computer program.  It is capable of calculating various molecular properties using the Hartree–Fock, MP2, MCSCF and coupled cluster theories.  Version 2.0 of DALTON added support for density functional theory calculations.  There are many authors, including Trygve Helgaker, Poul Jørgensen and Kenneth Ruud.

Ab initio quantum chemistry methods: "Ab initio" quantum chemistry methods are computational chemistry methods based on quantum chemistry.  The term "ab initio"

Supporting paragraphs: Dalton (program) John Dalton
Answer: meteorologist