| Acronym | Meaning |
| QC-SCF | Quadratically Convergent SCF (for Closed-shell Systems) |
| NAD | Nicotinamide Adenine Dinucleotide |
| RLPPS | Reactive Low-pressure Plasma Spraying |
| AHCPR | Agency For Health Care Policy And Research |
| FIRST | Faint Images Of The Radio Sky At Twenty Centimeters |
| NMMSS | Nuclear Materials Management And Safeguards System |
| IDMS | Integrated DWPF Melter System |
| TDDFT | Time-dependent Density-functional Theory |
| ECS | Electroconvulsive Shock |
| RDS | Respiratory Distress Syndrome |