| Acronym | Meaning |
| RCCSD | (spin) Restricted CCSD |
| SMT | Standards |
| AGMA | American Gear Manufacturers Association |
| BPTI | Bovine Pancreatic Trypsin Inhibitor |
| ICR | Intelligent Optical Character Recognition |
| NTIAC | Nondestructive Testing Information Analysis Center |
| MCCHF | Multiconfiguration Coupled Hartree-Fock |
| IBIC | Ion Beam Induced Charge |
| DWCDS | Drinking Water Criteria Documents |
| CIT | California Institute Of Technology |