| Acronym | Meaning |
| AFCRL | Air Force Cambridge Research Laboratories |
| SAROAD | Storage And Retrieval Of Aerometric Data |
| RPAE | Random Phase Approximation With Exchange |
| QRPA | Quadratic Random Phase Approxn. |
| ISSC | International Subcommission On Stratigraphic Classification |
| BCO | Bounded Crystal Orbital |
| CHAOS | Canadian High Acceptance Orbit Spectrometer |
| PHF | Projected Hartree Fock |
| ESCORT | Error Self-compensation Reached By Tau-scrambling |
| IC-ACPF | Internally Contracted (multireference) Averaged Coupled Pair Functional |