| Acronym | Meaning |
| POC | Particulate Organic Carbon |
| ORSTB | Overlap-reduced Semiempirical Tight-binding |
| HWD | Hazardous Waste Disposal |
| RTMS | Room Temperature Molten Salt |
| ICGCC | Integrated Coal Gasification Combined Cycle Plant |
| MPR | Maximum Permissible Risk |
| AHA | American Heart Association |
| PWB | Printed Wiring Board |
| IUCR | International Union Of Crystallography |
| AME | Apparent Mineralocorticoid Excess |