| Acronym | Meaning |
| HRATS | High-Rate Anaerobic Treatment Systems |
| DHF | Derivative Hartree-Fock (quantum Theory In Calcns. On Mols.) |
| NASDA | National Space Development Agency Of Japan |
| ACC | Acetyl-CoA Carboxylase |
| CIOS | Corrected Infinite-order Sudden (approxn In Mol. Collisions) |
| VOD | Veno-occlusive Disease |
| SPE | Solid Polymer Electrolyte |
| TCPTP | T-cell Protein Tyrosine Phosphatase |
| NHE | Na+-H+ Exchanger |
| CCST | Complex Coordinate Scattering Theory |