> name | calls method in Stanton and Gauss’s CFOUR program [manual]
> --- | ---
> c4-scf | Hartree–Fock (HF)
> c4-mp2 | 2nd-order Møller–Plesset perturbation theory (non-density-fitting) (MP2)
> c4-mp3 | 3rd-order Møller–Plesset perturbation theory (MP3)
> c4-mp4(sdq) | 4th-order MP perturbation theory (MP4) less triples
> c4-mp4 | full MP4
> c4-cc2 | approximate coupled cluster singles and doubles (CC2)
> c4-ccsd | coupled cluster singles and doubles (CCSD)
> c4-cc3 | approximate CC singles, doubles, and triples (CC3)
> c4-ccsd(t) | CCSD with perturbative triples (CCSD(T))
> c4-ccsdt | coupled cluster singles, doubles, and triples (CCSDT)
> cfour | expert full control over cfour program