| Acronym | Meaning |
| MR-CI-PS | Multireference-CI-perturbatively Selected |
| CPR | Chemically Perturbed Region |
| PSI | Pounds Per Square Inch |
| SPHINCS | Sequential PHoton Interrogation And Neutron Counting Signatures |
| DMC | Dough Molding Compound |
| UBFF | Urey-Bradley Force Field |
| SEND | Surfaces Enhanced For Neat Desorption |
| BCGA | British Compressed Gases Association |
| ROSAT | Roentgen Satellite |
| PERT | Program Evaluation And Review Technique |