| Acronym | Meaning |
| UNESCO | United Nations Educational |
| DZRS | Double Zeta Roos-Siegbahn (wave Functions) |
| TSSMS | Time Sharing Service Management System |
| CATS | Corrective Action Tracking System |
| RDF | Refuse Derived Fuel |
| TARP | Technical Assistance Response Program |
| EGO | Exhaust Gas Oxygen |
| BEW | Base (or Biological) Equivalent Weight |
| BIF | Boilers And Industrial Furnaces (USEPA Rule) |
| EKT | Extended Koopmans Theorem |