| Acronym | Meaning |
| FTP | US Federal Test Procedure (for Exhaust Catalysts) |
| HSC | Hyperspherical Coordinate (representation In Calcns. On Electron-atom Scattering) |
| CNT | Carbon Nanotube |
| SOS | Surfaces Of Section Method (semiclassical Calcn. Of Eigenvalues) |
| CGIAR | Consultative Group On International Agricultural Research |
| MO | Molecular Orbital |
| PURPA | Public Utility Regulatory Policy Act |
| ISE | Ion Selective Electrode |
| CCG | Continental Collision Granitoids |
| AID | Agency For International Development |