| Acronym | Meaning |
| PT2F | Second-order Perturbation Theory (with) Fock (matrix) |
| CSCF | Complex Self-consistent Field |
| HHMI | Howard Hughes Medical Institute |
| MPI | Modified Perturbation Iteration |
| ABLE | Arctic Boundary Layer Expedition |
| EGBD | Extrinsic Grain Boundary Dislocation |
| EIE | Equilibrium Isotope Effect |
| HDAC | Histone Deacetylase |
| NCLAP | National Crop Loss Assessment Program |
| VTE | Vertival Tube Exchanger |